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Natural and artificial OH defect incorporation into fluoride minerals at elevated temperature—a case study of sellaite, villiaumite and fluorite
The long-known presence of a sharp OH absorption band in the tetragonal fluoride mineral sellaite, MgF 2 , inspired us to conduct a detailed study of...
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Low-Temperature Geyserite and Ephemeral Minerals of Mogoiskii Thermal Spring (Northern Transbaikalia, Baikal Rift Zone)
AbstractFive samples of modern mineral sediments were collected during hydrogeochemical study of the Mogoiskii thermal spring in Northern...
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Natisite, Na2TiSiO5, an Indicator Mineral of Hyperagpaitic Hydrothermal Assemblages in the Lovozero and Khibiny Alkaline Plutons, Kola Peninsula: Occurrence, Crystal Chemistry, and Genetic Features
AbstractNatisite, a natural tetragonal ( P 4/ nmm ) modification of Na 2 TiSiO 5 = Na 2 TiO(SiO 4 ) is an abundant indicator mineral of relatively...
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Mineralogy and health risk assessment of trona consumed in parts of Ibadan, southwestern Nigeria
Trona, the second most consumed salt in many African countries, is usually consumed for different reasons. Heavy metals are natural components of...
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Economic Aspects of the Kenya Rift Lakes and Their Deposits
The Kenya Rift lakes are varied and of globally important ecological value and host several other less well-known resources. The most valuable...
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Experimental Study of the Solubility of Columbite, Pyrochlore, and Ta and Nb Oxides in Alkaline Hydrothermal Fluids at 300–550°C and 50 and 100 MPa
AbstractThe concentration and temperature dependences of the solubility of natural pyrochlore and columbite and Ta and Nb oxides are experimentally...
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Evolution of Pyroxenes of the Lovozero Rare Metal Deposit (Lower Zone)
AbstractThis paper reports the results of the first study of pyroxenes from the deepest zones of the Lovozero deposit. The geochemical and...
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Lake Processes and Sedimentation
The Kenya Rift lakes occupy grabens, sag basins, and depressions dammed by faulting and volcanic rocks. Modern lakes range from shallow (<1 m,...
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New Data on Mineralogy and Crystal Chemistry of the Lovozerite Group: Unusual Varieties of Kazakovite and Litvinskite
AbstractUnusual chemical and structural varieties of two lovozerite-group minerals from the Lovozero alkaline complex (Kola Peninsula) were studied...
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Composition and Mechanisms of Formation of Comendite Melts of the Early Mesozoic Bimodal Association of Sant, Central Mongolia
Based on the investigation of melt inclusions in minerals using electronic and ion microprobe analysis, we estimated the composition and evolution of...
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Human health risk assessment for fluoride and nitrate contamination in the groundwater: a case study from the east coast of Tamil Nadu and Puducherry, India
Consumption of contaminated groundwater leads to serious health problems and may restrain the socio-economic development of society. The study aims...
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Composition, Structure, and Conditions of Formation of Fluorine-Bearing Sodalite: Experimental Evidence
Fluoro-sodalite was synthesized for the first time at temperatures of 400–800°C and H 2 O pressures of 1–2 kbar in the Si–Al–Na–H–O–F system. X-ray...
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Experimental Study of the Crystallization Conditions of Ongonites of the Ary-Bulak Massif (Eastern Transbaikalia)
Phase equilibria were studied experimentally in three rock samples of the Ary-Bulak massif at T = 800–700°C, P = 1 kbar, water content 10 wt %, and...
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Fluoride occurrence and human health risk from groundwater use at the west coast of Urmia Lake, Iran
We investigated fluoride (F − ) concentration and physicochemical features of groundwater in the Urmia coastal aquifer (northwest, Iran). Groundwater...
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The Gorevskoe Pb–Zn Deposit (Siberia, Russia): Mineral Composition and Features of Ore Mineralization
AbstractThe genetic diversity of the structure and mineral composition of the ores of the Gorevskoe Pb–Zn deposit and the main signs of synchronous...
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Lake Bogoria
Saline alkaline Lake Bogoria occupies a narrow half-graben in a drainage basin floored by volcanic rocks of Miocene to Pleistocene age. The perennial...
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Hydro-geochemistry-based appraisal of summer-season groundwater from three different semi-arid basins of northeast Mexico for drinking and irrigation
Summer-season groundwater from three agricultural basins (i.e., El Potosi, Sandia and Cieneguilla) in drought-prone northeast Mexico was assessed for...
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Hydrogeochemical Characterization of Groundwater and Its Interaction with Other Components of the Environment in Mexico
Personal health and that of animals are often associated with the chemical composition of the groundwater they ingest. This primary source of water...
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Lake Magadi and Nasikie Engida
Lake Magadi, a hypersaline alkaline lake, occupies a hydrological sump (~600 m) in volcanic terrain (mainly trachyte) in the axial graben of the...
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Phase Distribution of Rare and Rare-Earth Elements in the Silicate–Fluoride Systems at Т = 800–1200°С and Р = 1–2 kbar (Experimental Investigations)
AbstractThe melt in the alumosilicate (granite) melt–molten fluoride salt system is experimentally studied at Т = 800–1200°С and Р = 1–2 kbar. The...
