A5055546274- Crystal Structures and Properties
- X-ray Diffraction in Crystallography
- Geological and Geochemical Analysis
- Chemical Synthesis and Characterization
- Mineralogy and Gemology Studies
- Radioactive element chemistry and processing
- Clay minerals and soil interactions
- Nuclear materials and radiation effects
- Inorganic Fluorides and Related Compounds
- Advanced Condensed Matter Physics
- Polyoxometalates: Synthesis and Applications
- High-pressure geophysics and materials
- Geochemistry and Geologic Mapping
- Zeolite Catalysis and Synthesis
- History and advancements in chemistry
- Solid-state spectroscopy and crystallography
- Thermal and Kinetic Analysis
- Metal Extraction and Bioleaching
- Metal-Organic Frameworks: Synthesis and Applications
- Glass properties and applications
- Inorganic Chemistry and Materials
- Crystallization and Solubility Studies
- Catalysis and Oxidation Reactions
- Geochemistry and Elemental Analysis
- Methane Hydrates and Related Phenomena
University of Manitoba
2016-2025
Oak Ridge National Laboratory
2019
Pacific Northwest National Laboratory
2019
University of Missouri
2012
University of Glasgow
2012
Tokyo Institute of Technology
2011
Institute of Geosciences and Earth Resources
2006-2011
University of Stuttgart
2009-2011
Laurentian University
2009
University of Pavia
2008
Abstract The International Mineralogical Association's approved amphibole nomenclature has been revised in order to simplify it, make it more consistent with divisions generally at 50%, define prefixes and modifiers precisely include new species discovered named since 1978, when the previous scheme was approved. same reference axes form basis of most names are little changed but compound like tremolitic hornblende (now magnesiohornblende) abolished also crossite glaucophane or...
A new classification and nomenclature scheme for the amphibole-supergroup minerals is described, based on general formula AB 2 C 5 T 8 O 22 W , where = □, Na, K, Ca, Pb, Li; B Mn 2+ Fe Mg, Al, 3+ Ti 4+ Si, Be; (OH), F, Cl, 2− . Distinct arrangements of formal charges at sites (or groups sites) in amphibole structure warrant distinct root names are, by implication, species; a specific name, different homovalent cations (e.g., Mg vs. ) or anions OH F) are indicated prefixes ferro-, fluoro-)....
A nomenclature for tourmaline-supergroup minerals is based on chemical systematics using the generalized tourmaline structural formula: XY3Z6(T6O18)(BO3)3V3W, where most common ions (or vacancy) at each site are X = Na1+, Ca2+, K1+, and vacancy; Y Fe2+, Mg2+, Mn2+, Al3+, Li1+, Fe3+, Cr3+; Z T Si4+, B3+; B V OH1- O2-; W OH1-, F1-, O2-. Most compositional variability occurs X, Y, Z, W, sites. Tourmaline species defined in accordance with dominant-valency rule such that a relevant dominant ion...
Published two-body bond-valence parameters for cation–oxygen bonds have been evaluated via the root mean-square deviation (RMSD) from valence-sum rule 128 cations, using 180 194 filtered bond lengths 31 489 coordination polyhedra. Values of RMSD range 0.033–2.451 v.u. (1.1–40.9% per unit charge) with a weighted mean 0.174 (7.34% charge). The set best published has determined ions and used as benchmark determination new in this paper. Two common methods derivation evaluated: (1) fixing B...
Abstract The introduction of a fifth amphibole group, the Na-Ca-Mg-Fe-Mn-Li defined by 0.50 < B (M g ,Fe 2+ ,Mn ,Li) 1.50 and ≤ (Ca,Na) a.f.p.u. (atoms per formula unit), with members whittakerite ottoliniite, has been required recent discoveries (LiNa) amphiboles. This, other new discoveries, such as sodicpedrizite (which, here, is changed slightly, but significantly, from original idealized formula), necessitate amendments to IMA 1997 definitions M -Fe-Mn-Li, calcic, sodic-calcic sodic...
Research Article| January 01, 2000 The Crystal Chemistry of Sulfate Minerals Frank C. Hawthorne; Hawthorne Department Geological Sciences, University Manitoba, Winnipeg, Canada R3T 2N2 Search for other works by this author on: GSW Google Scholar Sergey V. Krivovichev; Krivovichev Civil Engineering and 156 Fitzpatrick Hall, Notre Dame, Indiana 46556 Peter Burns Reviews in Mineralogy Geochemistry (2000) 40 (1): 1–112. https://doi.org/10.2138/rmg.2000.40.1 Article history first online: 09 Mar...
The distribution of bond lengths in (V3+O6) polyhedra shows a maximum between 1.98 and 2.04 Å, limits 1.88 2.16 respectively. (V4+On) (V5+On) (n = 5, 6) show distinct populations which allow us to define the following types bonds: (1a) vanadyl bonds polyhedra, shorter than 1.74 Å; (1b) (V5+O5) 1.76 (1c) (V5+O6) (2a) equatorial range 1.90 2.12 (2b) longer (2c) with one bond, 2.10 (2d) two bonds, 1.80 2.00 (3a) trans (V4+O6) (3b) 2.15 (3c) 2.025 Å. average length can be used calculate mean...
Bond-length distributions have been examined for 55 configurations of alkali-metal ions and 29 alkaline-earth-metal bonded to oxygen, 4859 coordination polyhedra 38 594 bond distances (alkali metals), 3038 24 487 (alkaline-earth metals). Bond lengths generally show a positively skewed Gaussian distribution that originates from the variation in Born repulsion Coulomb attraction as function interatomic distance. The skewness kurtosis these decrease with increasing number central cation, result...
Abstract. A major issue of Arctic marine science is to understand whether the Ocean is, or will be, a source sink for air–sea CO2 exchange. This has been complicated by recent discoveries ikaite (a polymorph CaCO3·6H2O) in and Antarctic sea ice, which indicate that multiple chemical transformations occur ice with possible effect on pH conditions surface waters. Here, we report biogeochemical conditions, microscopic examinations x-ray diffraction analysis single crystals from melting 1.7 km2...
Research Article| January 01, 2002 The Crystal Chemistry of the Phosphate Minerals Danielle M.C. Huminicki; Huminicki Department Geological Sciences, University Manitoba Winnipeg, Manitoba, Canada R3T 2N2 Search for other works by this author on: GSW Google Scholar Frank C. Hawthorne Reviews in Mineralogy and Geochemistry (2002) 48 (1): 123–253. https://doi.org/10.2138/rmg.2002.48.5 Article history first online: 03 Mar 2017 Cite View This Citation Add to Manager Share Icon Facebook Twitter...