D. G. Rancourt

D. G. Rancourt
Ontario Civil Liberties Association

37.29
?·?
PhD

About

146
Publications
209,157
Reads
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4,309
Citations
Introduction
Former tenured and Full Professor of physics at the University of Ottawa, Canada. Known for applications of physics education research. Published over 100 scientific articles in the areas of metal physics, materials science, measurement methods, and earth and environmental science, and many social commentary essays. Author of the book Hierarchy and Free Expression in the Fight Against Racism.
Research Experience
August 2014 - present
Ontario Civil Liberties Association
Position
  • Researcher
Description
  • Volunteer Researcher. And some case responses, and media response on some issues. See: ocla.ca
March 1987 - April 2009
University of Ottawa
Position
  • Professor (Full)
June 1985 - June 1986
Leiden University
Position
  • NSERC International Post-Doctoral Fellow
Education
May 1981 - May 1984
University of Toronto
Field of study
  • Physics
April 1980 - April 1981
University of Toronto
Field of study
  • Physics
September 1976 - April 1979
University of Ottawa
Field of study
  • Physics

Publications

Publications (146)
Article
Full-text available
Iron oxides affect many elemental cycles in aquatic sediments via numerous redox reactions and their large sorption capacities for phosphate and trace elements. The reactive ferric oxides and oxyhydroxides are usually quantified by operationally defined selective chemical extractions that are not mineral specific. We have used cryogenic 57Fe M?ssba...
Research
Full-text available
Abstract Part-I: I critically review the context of cancer research, where it has been advanced that most published research findings are false, that medicine itself is the third leading cause of death in the Western world, and that experienced stress arising from an individual’s position in society’s dominance hierarchy is the primary determinant...
Research
Full-text available
In this critical review of the scientific literature about fire, I describe how the false notion of a link between forest fires and anthropogenic CO2 was ignited in 2006 by a fatally flawed article promoted in the science-trend-setting magazine Science, and spread like wildfire through the scientific literature and beyond, driven in part by high wi...
Technical Report
Full-text available
Introduction / Abstract: The influence of geopolitical and global economic conditions on the fabric of domestic societies and on individual psychology is most frequently underestimated by civilian commentators, especially regarding Western "free and democratic" societies. The military, on the other hand, do not underestimate the importance of broad...
Technical Report
Full-text available
Canada has spawned a legal landscape not unlike that of past eras having blasphemy laws to prevent the alleged deleterious effects of the most offensive and subversive utterances of the day. This legal landscape vitiates the fundamental right of freedom of expression and incapacitates democracy itself.
Technical Report
Full-text available
Introduction by Denis G. Rancourt: ---- In this letter to me, Joseph accomplishes the following points: ? an explanation of the various kinds of fatality rates for a pathogen ? a review of the measured infection fatality rates for SARS-CoV-2 ? a demonstration that a recently changed CDC evaluation is most certainly incorrect, along with an illustr...
Technical Report
Full-text available
We analyzed historic and recent all-cause mortality data for France, and other jurisdictions for comparison, using model fitting to quantify winter-burden deaths, and deaths from exceptional events. In this way, COVID-19 is put in historic perspective. We prove that the "COVID-peak" feature that is present in the all-cause mortality data of certain...
Technical Report
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A vile new mantra is on the lips of every public health official and politician in the global campaign to force universal masking on the general public: “there is a growing body of evidence”. This propagandistic phrase is a vector designed to achieve five main goals: - Give the false impression that a balance of evidence now proves that masks red...
Technical Report
Full-text available
The latest data of all-cause mortality by week does not show a winter-burden mortality that is statistically larger than for past winters. There was no plague. However, a sharp "COVID peak" is present in the data, for several jurisdictions in Europe and the USA. This all-cause-mortality "COVID peak" has unique characteristics: ? Its sharpness, with...
Technical Report
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We review the scientific literature about general-population-lockdown and social-distancing measures, which is relevant to mitigation policy in Canada. Federal and provincial Canadian government responses to and communications about COVID-19 have been irresponsible. The latest research implies that the government interventions to “flatten the curve...
Technical Report
Full-text available
How to obtain and setup and use the free Mossbauer spectroscopy software "Recoil for Windows".
Article
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In this article, I develop a physics model of the bimodal personality of the social animal. The model uses free-energy barrier-crossing theory and provides a new and testable paradigm of individual behaviour and perception in a dominance hierarchy. Published by Dissident Voice, on January 2, 2019: https://dissidentvoice.org/2019/01/stability-and-d...
Article
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I propose that the animal has two modes of being, which are binary end-points on an attitudinal, self-image and behavioural psychological-state-scape. The psychological-state-scape is binary in the two modes because the metabolic physiologies of the two modes are incompatible. The holistic state of being cannot be both simultaneously. Different blo...
Article
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After a reminder of the historical origin of and institutional rational for academic freedom and tenure, I describe an on-going egregious case of a university's violation of the academic freedom and constitutional rights of a tenured Full Professor in Canada. https://dissidentvoice.org/2018/02/academic-freedom-how-nasty-can-a-university-be/
Article
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Societies of social animals, including humans, are dominance hierarchies. Civil rights are codified in law to protect mechanisms of essential counter measures against excessive exploitation of the hierarchy by elite classes, which destabilizes the entire society. Systemic pathology arises when elite classes can change the regulatory codes themselve...
Article
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I briefly describe the anthropological origin and recent statutory embodiments of human rights of individuals. I show that the modern " democratic " state moderates the rights of individuals by both: (1) violating the said rights in order to maintain and enforce the societal dominance hierarchy, and (2) preventing disproportionate violations, to av...
Research
Full-text available
I show that the de facto police practice of constant random harassment by carding (demanding identification) and a spectrum of other means, combined with less frequent unprovoked executions and prosecutions using false charges, in containing groups targeted for containment is exactly the most effective and efficient strategy for hierarchical contai...
Working Paper
Full-text available
Defamation law in Canada is contrary to international law, in both design and practice. Under international law, the right to hold an opinion is absolute, and the right of freedom of expression can be restricted “for respect of the rights or reputations of others” solely using written laws that must conform to the “strict tests of necessity and pro...
Article
Soil iron mineral composition emerges from a dynamic interplay between processes causing selective mineral addition/removal (both physically and chemically-driven) and processes affecting in situ mineral transformation. Discerning the influence of these pedogenic processes in a temporally integrated manner is fundamentally relevant to many biogeoch...
Book
Full-text available
"Denis Rancourt has turned the entire notion of RACISM on its head and at the same time exposes racist acts committed by others to deflect that characterization from sticking at the highest levels of The Academy. North American civil rights defenders need this book at this time. Rancourt’s deeply incisive Fight Against Racism brings us back to the...
Preprint
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I describe the basic physics of planetary radiation balance and surface temperature, using the simplest model possible that is sufficiently realistic for correct evaluations of predicted surface temperature response sensitivities to the key Earth parameters. The model is constrained by satellite absolute integrated intensity and spectroscopic measu...
Article
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The 57Fe M?ssbauer spectrum of Fe2As has been measured in the temperature range 25–456 K. Evidence is found for two factors that affect the spectrum and that had been neglected in earlier investigations. These are (i) spin relaxation in a time period that is short compared with the characteristic M?ssbauer measurement time and (ii) an anisotropy in...
Article
Full-text available
A novel situation in which long-range magnetic order coexists with (super)paramagnetism occurs in a new graphite biintercalation compound: FeCl3–NiCl2–graphite. Several compounds have been prepared by sequential intercalation of the two intercalates and have been characterized by powder diffractometry, X-ray precession photographs, high-precision X...
Article
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In this first single-crystal M?ssbauer study of mica we have measured the room-temperature spectra for different orientations (with respect to the -γ-ray flux) of a well-characterized monocrystalline wafer of natural phlogopite. We apply a new method (D. G. Rancourt, Nucl. Instrum. Methods Phys. Res. B44, 199 (1989). of performing thickness correct...
Article
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We have studied magnetic layered materials that have in-plane ferromagnetic exchange interactions, and dipole–dipole only interplane interactions. These are biotite mica (including a nearly ideal annite end member) and new graphite bi-intercalation compounds that contain regularly stacked arrays of ferromagnetic and diamagnetic intercalates. All th...
Article
Full-text available
An atomic-scale multilayer with two types of ferromagnetic layers is achieved by graphite intercalation. It is a bi-intercalation compound with stacking sequence CrCl3NiCl2NiCl2/… where/represents a graphite layer. The two types of chloride layers are much as they occur in the pristine chlorides and have the same lattice parameters and intralayer i...
Article
Full-text available
Measured 57Fe-isomer shifts for face-centered cubic FeyNi1?y alloys show a linear variation with ?1S/?y = +0.10 mm s?1 up to followed by a plateau at , up to the structural stability limit at . This is in disagreement with recent ab initio calculations, however, the increase at is in quantitative agreement with an older modified tight-binding appro...
Article
Full-text available
Iron compounds in soil are multifunctional, providing physical structure, ion sorption sites, catalytic reaction-centers, and a sink for respiratory electrons. Basaltic soils contain large quantities of iron that reside in different mineral and organic phases depending on their age and redox status. We investigated changes in soil iron concentratio...
Article
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A tenured Canadian physics professor, fired for his dissidence, breaks ranks by asserting that established orthodoxy in economics, medicine and science is intended as a web of lies to shield and maintain power structures.
Article
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Ferrihydrite is a key reactive nanoparticle in the Earth Surface environment that regulates nutrient and metal cycling in marine, lacustrine, and groundwater settings; yet its genesis is unknown and there is no mechanistic explanation of its nanostructural nature. We develop a model, based on established aqueous precipitation theory, for rough-surf...
Article
Full-text available
I review my more than 40 years experience with the educational system in (Ontario) Canada, from my days as student to my 2009 dismissal as a tenured physics professor at the University of Ottawa, and conclude that a transformation of the student persona has accompanied the imposed system reforms and that this persona reflects real psychological cha...
Article
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We present a chemical and mineralogical explanation, derived from powder X-ray diffraction and M?ssbauer spectroscopy measurements of synthetic samples, of the P:Fe = 1:2 limiting ratio of P incorporation (as PO4) that was previously observed in natural aquatic oxic iron precipitates. The 57Fe M?ssbauer hyperfine parameters are interpreted with the...
Article
Full-text available
We report transport and thermodynamic properties of stoichiometric single crystals of the hexagonal iron-pnictide FeCrAs. The in-plane resistivity shows an unusual "non-metallic" dependence on temperature T, rising continuously with decreasing T from ~ 800 K to below 100 mK. The c-axis resistivity is similar, except for a sharp drop upon entry into...
Article
Full-text available
Recently, Michel et al. (2007a) have presented a structure for ferrihydrite that we show to be incorrect. We do this by comparing (1) the sample form factor without adjustable parameters from powder X-ray diffraction data using a recently developed method with (2) exactly simulated (Debye-sum method) theoretical sample form factors for the recently...
Article
Full-text available
The sorption of 57Fe(II) onto an Fe-free, mineralogically pure and Ca-saturated synthetic montmorillonite sample (structural formula: Ca0.15(Al1.4Mg0.6)(Si4)O10(OH,F)2), was studied as a function of pH under strictly anoxic conditions (N2 glove box atmosphere, O2 content <1 ppm), using wet chemistry and cryogenic (T = 77 K) 57Fe M?ssbauer spectrome...
Article
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A description of the "activism course" project at the University of Ottawa, Canada. (This article was also printed in the September/October 2007 issue of "DESIGNER / builder" magazine.)
Article
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We perform, for the first time, a global sensitivity analysis on a generic diagenetic reaction-transport model (RTM) to elucidate the effects of environmental, thermodynamic, and kinetic factors on the magnitudes of phosphorus release fluxes from aquatic sediments under a range of conditions typically found in lake sediments. Our model includes the...
Article
Full-text available
Ninety-nine lakes were sampled at varying distances up to 75 km from the Horne smelter at Rouyn-Noranda, Quebec, to study the influence of the smelter versus other factors on metal concentrations in lake sediments. Most of these lakes he within the Abitibi Greenstone Belt, a zone of extensive base metal and gold mineralization and the focus of a mi...
Article
Full-text available
An Inceptisol A-horizon from Hawaii was subjected to a series of reduction-oxidation cycles—14 d cycle length over a 56 d duration—across the “soil-Fe” [Fe(OH)3.Fe2+(aq), log Ko = 15.74] equilibrium in triplicate redox-stat reactors. Each reducing event simulated the flush of organic C and diminished O2 that accompanies a rainfall-induced leaching...
Article
We report M?ssbauer spectra, magnetic hysteresis, acquisition and demagnetization of isothermal remanent magnetization (IRM), and low-temperature IRM warming curves of biotite crystals, as well as a summary of domain observations on magnetic extracts. The biotites are from 1.0 to 1.2 Ga gneisses and 1.85 Ga plutons of the Grenville, Churchill and B...
Article
Full-text available
"Global warming is causing extinction of the political species" by Denis G. Rancourt Caucus - The Political Magazine of the Students, University of Ottawa, Vol.6, Issue 3, February-March 2006, page 10
Article
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In this first systematic, theoretical study of the complete electric field gradient (EFG) tensor of Fe-57 Mossbauer spectroscopy as a function of chemistry and local structural distortion using electronic structure calculations, local EFG tensors were calculated at the central Fe2+ sites in clusters of seven octahedra, where the neighbor octahedra...
Article
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Many natural surface-environment samples, such as soils and marine and lacustrine sediments, are complex mixtures involving several mineral phases (both petrogenic and authigenic), several amorphous and nanoparticulate inorganic phases (usually authigenic or pedogenic), and a heterogeneous amorphous component of "organic matter" (OM). The main inor...
Article
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Based on powder X-ray diffraction (pXRD) measurements of many mica solid solution series of synthetic powder samples (between Mg, Co, Ni, and Fe end-members, with different degrees of oxidation, vacancy, and Al/Si contents, and including an OH/F substitution series; 75 samples indexed as 1M polytype, space group C2/m) and on 175 previously publishe...
Article
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We have used room temperature and cryogenic 57Fe M?ssbauer spectroscopy, powder X-ray diffraction (pXRD), mineral magnetometry, and transmission electron microscopy (TEM), to study the synthetic precipitation of hydrous ferric oxides (HFOs) prepared either in the absence (abiotic, a-HFO) or presence (biotic, b-HFO) of nonmetabolizing bacterial cell...
Article
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Fe cycling at two sites in the Mediterranean Sea (southwest of Rhodes and in the North Aegean) has been studied, combining the pore water determination of nutrients, manganese, and iron, citrate-bicarbonate-dithionite (CDB) and total sediment extractions, X-ray diffraction, and 57Fe M?ssbauer spectroscopy (MBS). At the Rhodes site, double peaks in...
Article
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A suite of 22 members of the heterophyllosilicate astrophyllite-group from SiO2-over- and undersaturated igneous rocks were studied by single-crystal X-ray diffraction, wave-length dispersive electron microscopy and room temperature 57Fe M?ssbauer spectroscopy. This is the first study of its kind for this mineral group and presents the relationship...
Article
Mathematical modeling of sediment early diagenesis always involves choosing and describing a set of chemical reactions and processes that is both self-consistent and sufficient for the problem at hand. This critical choice is always a compromise between describing the system’s complexity in all details and using a manageable set of reactions with k...
Article
Full-text available
A suite of 22 members of the heterophyllosilicate astrophyllite-group from SiO2-over- and undersaturated igneous rocks were studied by single-crystal X-ray diffraction, wave-length dispersive electron microscopy and room temperature Fe-57 Mossbauer spectroscopy. This is the first study of its kind for this mineral group and presents the relationshi...
Article
Full-text available
Mineral magnetometry is underused in characterizing natural and synthetic nanophase, nanoparticle, and nanocomposite materials, where it has certain advantages over more sophisticated methods, such as high-resolution microscopies and synchrotron-based spectroscopies. We developed the physical theory of direct current (dc) field equilibrium magnetom...
Article
Reaction of the dipotassium salt of the dipyrrolide dianion [1,1-(2-C4H3N)2C6H10]2- with FeCl2(THF)1.5 afforded the tetranuclear [μ,η5-{[1,1-(2-C4H3N)2C6H10]2Fe}Fe]2 (1) cluster containing two diamagnetic ferrous links π-bonded to two pyrrolyl rings of two ligands and closely reminiscent of a ferrocenoid-type arrangement. Reaction of the dianionic...
Article
In natural environments, geochemical studies have shown the presence of discrete iron-phosphorus phases. In the eutrophic riverine part of the Scheldt estuary (Belgium), an Fe-P phase represents up to 25% and 90% of total Fe and P, respectively. The high reactivity of the Fe-P phase suggests that it drives the coupling between P and Fe cycles in th...
Article
The Lake Sediment Structure and Evolution (LSSE) group at the University of Ottawa (www.science.uottawa.ca/LSSE/) is interested in both experimental characterization and modeling of metal and nutrient cycling in lacustrine sediments. One of the prime research directions is to understand phosphorus releases from sediments that lead to nuisance algal...
Article
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We report the first direct observation of a high-moment (HM)/low-moment (LM) transition occurring in face centered cubic (FCC) Fe-Ni alloys. 57 Fe M?ssbauer isomer shifts (ISs) give local electronic densities that exhibit a large discontinuity of , 0.4 el./ $ a_{0}^3 $ at the transition that spans the concentration range 65-75 apc (atomic percent)...
Article
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I argue that the main models that have been advanced to explain Invar behavior in Fe-Ni alloys (the original, classical, Invar system) can all be shown to be critically deficient, except one: The local moment frustration model of Rancourt and Dang ( Phys. Rev. B , 54 , 12225, 1996). The latter model explains all the measured structural, magnetic, a...
Article
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A synthetic octahedral-site-vacancy-free annite sample and its progressive oxidation, induced by heating in air, were studied by powder X-ray diffraction (pXRD), M6ssbauer spectroscopy, nuclear reaction analysis (NRA), Raman spectroscopy, X-ray fluorescence (XRF) spectroscopy, gas cba-omatography (GC), thennogravimetric analysis (TGA), differential...
Article
Full-text available
We report the first conclusive observation of a high-moment (HM)/low-moment (LM) transition occurring in face centered cubic Fe–Ni alloys. 57Fe M?ssbauer isomer shifts give local electronic densities that exhibit a large discontinuity of ~0.4 el./a03 at the transition that spans the concentration range ~60–80 at% Fe, in agreement with ab initio pre...
Article
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We characterized the most As-rich natural hydr ous ferric oxide (HFO) material ever reported using powder X-ray diffraction (pXRD), transmission electron microscopy (TEM), X-ray fluores- cence spectroscopy (XRF), light element analysis using gas chromatography (GC), visible-infrared (vis-IR) diffuse reflectivity, 57 Fe M?ssbauer spectroscopy, and s...
Article
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Superparamagnetism, the archetypal small particle phenomenon, was first described by Louis Neel (1949a,b) in the context of rock magnetism. Key features of the underlying micromagnetism had been described by Stoner and Wohlfarth (1948), in the context of industrial magnetic alloys. The physical theory of superparamagnetism was further developed by...
Article
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By use of Monte Carlo simulations of chemical ordering, magnetic ordering, and magnetovolume thermal effects and by reviewing the known effects of chemical order in the face-centered-cubic Fe-Ni alloy system, we show that the observations of Dumpich et al. [Phys. Rev. B 46, 9258 (1992)], who report unique Invar-composition Fe65Ni35 samples that exh...
Article
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[Rejected article. Had been submitted as a Scientific Correspondence to Nature, in August 1999.] -- All authors who have performed T = 0 K electronic structure calculations in an effort to elucidate lnvar behaviour, including the authors of a recent Letter to Nature and the author of the associated 顺心彩票 and Views, have discussed their results in te...
Conference Paper
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A new model, developed by Lagarec and Rancourt, for distributions of hyperfine parameters in Mossbauer spectroscopy is briefly described and is applied to the spectrum of a synthetic taenite. The model extends from the Voigt-based fitting (VB F) method introduced by Rancourt and Ping (1991) and generalizes VBF to handle the more realistic cases of...
Conference Paper
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Based on a recent study of several samples of synthetic hematite-like materials and on a review of the literature, we propose a unified structuro-chernical description of all such hematite-like materials that contain only Fe, 0 , and H (either as incorporated H20 or as structural OH-groups). This description consists in a diagram of the c lattice p...
Article
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We provide an experimental proof that the so-called `paramagnetic phase’ seen in Fe–Ni-bearing meteorites has a very different electronic structure from that of all other known Fe–Ni minerals, in support of the recent proposal that it is a low moment phase and a new meteoritic mineral. M?ssbauer isomer shift measurements, corrected for second-order...
Conference Paper
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We have used several complementary teclmiques to perform mineralogical, chemical, and magnetic characterizations of samples from the S3/L4 couplet of the loess/paleosol section at Baoji, China. Our approach combines: powder X-ray diffraction. X-ray fluorescence analysis. light element analyses, magnetometry. and Fe-57 Mossbauer spectroscopy. We fin...
Conference Paper
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We have measured octahedral Fe3+ and tetrahedral Fe3+ site populations, in annite samples equilibrated at different temperatures under the C-CH4 buffer at 2 kbar, with sufficient accuracy (0.2-1 %total-Fe) to test a lateral constraint model that includes differential thermal expansion of the tetrahedral and octahedral bonds, in addition to previous...
Conference Paper
Full-text available
Specimens of muscovite from Siluro-Devonian Appalachian granites of the Gander zone in New Brunswick were studied by ~7Fe Mossbauer spectroscopy, microprobe analysis and X-ray powder ditfractometry. Chemical compositions, corresponding structural formulae and powder patterns indicate that they are dioctahedral true micas of 2M1 polytype. Mossbauer...
Article
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We have studied several synthetic hematite-like materials, produced via different reactions using various hydrothermal conditions and various temperatures of annealing in air, by bulk elemental analysis, weight loss measurements, scanning electron microscopy, powder X-ray diffraction, M?ssbauer spectroscopy, and SQUID magnetometry. We conclude that...
Article
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This is the introductory paper of the M?ssbauer Symposium of the 11th International Clay Conference (ICC '97), held in Ottawa, June 15–21, 1997. Its purpose is to introduce the Symposium and M?ssbauer spectroscopy to the non-expert. We answer the questions: “What is M?ssbauer spectroscopy and how does it work?”, “How is it particularly useful in cl...
Article
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We compare ferric/ferrous determinations in mica granules and powders, as obtained by the Pratt and Wilson wet chemical (WC) methods and by M?ssbauer spectroscopy (MS). The Pratt method is accurate whereas the Wilson method is not but both have the same precision (σ = 1.2 wt.% FeO). Assuming that the Pratt WC method gave accurate ferric/ferrous rat...