Search Results - "Jakub Plášil"
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Mineralogy, Crystallography and Structural Complexity of Natural Uranyl Silicates
Published in Minerals (Basel) (01-12-2018)“…Naturally occurring uranyl silicates are common constituents of the oxidized parts (i.e., supergene zone) of various types of uranium deposits. Their abundance…”
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Crystal Structure, Infrared Spectrum and Elastic Anomalies in Tuperssuatsiaite
Published in Scientific reports (05-05-2020)“…The full crystal structure of the phyllosilicate mineral tuperssuatsiaite, including the positions of the hydrogen atoms in its unit cell, is determined for…”
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Uranosphaerite: Crystal structure, hydrogen bonding, mechanics, infrared and Raman spectroscopy and thermodynamics
Published in The Journal of physics and chemistry of solids (01-06-2020)“…A detailed structural, spectroscopic, mechanical and thermodynamic characterization of the bismuth uranyl-oxide hydroxy-hydrate mineral uranosphaerite,…”
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Crystallization of Uranyl Silicate Natroboltwoodite during an Experimental Dissolution of the Mineral Yttrialite-(Y): Crystal Structure and Raman Spectroscopy
Published in Crystal growth & design (02-02-2022)“…A synthetic analogue of the mineral natroboltwoodite was obtained unprecedently during a dissolution experiment with the mineral yttrialite-(Y), at a…”
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The magnesium uranyl tricarbonate octadecahydrate mineral, bayleyite: Periodic DFT study of its crystal structure, hydrogen bonding, mechanical properties and infrared spectrum
Published in Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy (15-06-2020)“…Bayleyite is a highly hydrated uranyl tricarbonate mineral containing eighteen water molecules per formula unit. Due to this large water content, the correct…”
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Crystal structure of vyacheslavite, U(PO)(OH), solved from natural nanocrystal: a precession electron diffraction tomography (PEDT) study and DFT calculations
Published in RSC advances (24-06-2019)“…The crystal structure of the U( iv )-phosphate mineral vyacheslavite has been solved from precession electron diffraction tomography (PEDT) data from the…”
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Structural complexity of natural uranyl sulfates
Published in Acta crystallographica Section B, Structural science, crystal engineering and materials (01-02-2019)“…Uranyl sulfates, including those occurring in Nature (∼40 known members), possess particularly interesting structures. They exhibit a great dimensional and…”
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Molybdenum Disorder in Hydrated Sedovite, Ideally U(MoO4)2·nH2O, a Microporous Nanocrystalline Mineral Characterized by Three-Dimensional Electron Diffraction, Density Functional Theory Computations, and Complexity Analysis
Published in Inorganic chemistry (18-10-2021)“…Sedovite, U4+(Mo6+O4)2·nH2O, is reported as being one of the earliest supergene minerals formed of the secondary zone. The difficulty of isolating enough pure…”
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Arsenic-Rich Acid Mine Water with Extreme Arsenic Concentration: Mineralogy, Geochemistry, Microbiology, and Environmental Implications
Published in Environmental science & technology (02-12-2014)“…Extremely arsenic-rich acid mine waters have developed by weathering of native arsenic in a sulfide-poor environment on the 10th level of the Svornost mine in…”
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Revealing hydrogen atoms in a highly-absorbing material: an X-ray diffraction study and Torque method calculations for lead-uranyl-oxide mineral curite
Published in RSC advances (01-01-2019)“…The crystal structure of lead uranyl-oxide hydroxy-hydrate mineral curite, ideally Pb (H O) [(UO ) O (OH) ] , was studied by means of single-crystal X-ray…”
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Prediction and observation of formation of Ca–Mg arsenates in acidic and alkaline fluids: Thermodynamic properties and mineral assemblages at Jáchymov, Czech Republic and Rotgülden, Austria
Published in Chemical geology (05-01-2021)“…The underground spaces of the former mines in Jáchymov, Czech Republic and Rotgülden, Austria house diverse assemblages of secondary minerals, mostly…”
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Complete Crystal Structures and Elastic Properties of the Uranyl Minerals Johannite, Pseudojohannite and Derriksite
Published in Crystals (Basel) (01-10-2022)“…Due to the high solubility of uranyl sulfate and selenite minerals, the investigation involving the determination of the crystal structures and physical…”
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The effect of chemical variability and weathering on Raman spectra of enargite and fahlore
Published in European journal of mineralogy (Stuttgart) (04-09-2023)“…Enargite (Cu3AsS4) and tennantite (Cu12As4S13) are typical As-bearing sulfides in intermediate- and high-sulfidation epithermal deposits. Trace and major…”
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Full crystal structure, hydrogen bonding and spectroscopic, mechanical and thermodynamic properties of mineral uranopilite
Published in RSC advances (27-08-2020)“…The determination of the full crystal structure of the uranyl sulfate mineral uranopilite, (UO 2 ) 6 (SO 4 )O 2 (OH) 6 ·14H 2 O, including the positions of the…”
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Micro‐Raman spectroscopy of natural members along CuSbS2–CuSbSe2 join
Published in Journal of Raman spectroscopy (01-08-2018)“…Micro‐Raman spectroscopy was used to investigate the natural orthorhombic members (space group Pnma) along the CuSbS2–CuSbSe2 join: chalcostibite…”
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A simple method for the prediction of the orientation of H2O molecules in ionic crystals
Published in Journal of applied crystallography (01-08-2018)“…A robust and fast method is presented that provides a simple real‐space convergent solution for identifying equilibrium orientations of crystallization H2O…”
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Hidden and apparent twins in uranyl‐oxide minerals agrinierite and rameauite: a demonstration of metric and reticular merohedry
Published in Journal of applied crystallography (01-12-2021)“…In this work, the structures of chemically related uranyl‐oxide minerals agrinierite and rameauite have been revisited and some corrections to the available…”
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The crystal structure of Tl2.36Sb5.98As4.59S17, the lead-free endmember of the chabournéite homeotypic group
Published in Canadian mineralogist (02-08-2021)“…The crystal structure of Tl2.36Sb5.98As4.59S17, the lead-free endmember of the chabournéite homeotypic group, from the Tl-As-Sb-rich gold deposit at…”
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Synthesis and stability of some members of the pharmacosiderite group, AFe4(OH)4(AsO4)3·nH2O (A = K, Na, 0.5Ba, 0.5Sr)
Published in Canadian mineralogist (30-09-2019)“…Samples of the pharmacosiderite group were synthesized either directly, from aqueous solutions at 160 °C, or by ion exchange over extended periods of time at…”
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Crystal Chemistry and Structural Complexity of the Uranyl Carbonate Minerals and Synthetic Compounds
Published in Crystals (Basel) (01-06-2021)“…Uranyl carbonates are one of the largest groups of secondary uranium(VI)-bearing natural phases being represented by 40 minerals approved by the International…”
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