WebJul 17, 2024 · Fluorite and accompanying ore mineralization might have been formed in certain instances not by hydrothermal–metasomatic processes but during the fluid–magmatic stage as a result of the transformation of F–Ca melt enriched in REE, Y, and other trace elements. Download to read the full article text References WebMar 14, 2024 · According to the modern concept about the structure of nonstoichiometric fluorite phases M1−xRx F 2+x, the defects formed as a result of heterovalent isomorphic replacement of M2+ cations by R3+ cations are grouped into clusters. The anion core of the clusters consists of interstitial anions.
(PDF) Evolution of the Fluoride–Calcium Melt ... - ResearchGate
Fluorite forms as a late-crystallizing mineral in felsic igneous rocks typically through hydrothermal activity. It is particularly common in granitic pegmatites. It may occur as a vein deposit formed through hydrothermal activity particularly in limestones. In such vein deposits it can be associated with galena, … See more Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2. It belongs to the halide minerals. It crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are … See more Fluorite crystallizes in a cubic motif. Crystal twinning is common and adds complexity to the observed crystal habits. Fluorite has four perfect cleavage planes that help produce octahedral fragments. The structural motif adopted by fluorite is so common that the … See more Fluorite is allochromatic, meaning that it can be tinted with elemental impurities. Fluorite comes in a wide range of colors and has consequently been dubbed "the most colorful mineral in the world". Every color of the rainbow in various shades is represented by … See more In 2012, the first source of naturally occurring fluorine gas was found in fluorite mines in Bavaria, Germany. It was previously thought that See more The word fluorite is derived from the Latin verb fluere, meaning to flow. The mineral is used as a flux in iron smelting to decrease the viscosity of slag. The term flux comes from the Latin adjective fluxus, meaning flowing, loose, slack. The mineral fluorite was originally … See more George Gabriel Stokes named the phenomenon of fluorescence from fluorite, in 1852. Many samples of fluorite exhibit fluorescence under ultraviolet light, a property that takes its name from fluorite. Many minerals, as … See more Source of fluorine and fluoride Fluorite is a major source of hydrogen fluoride, a commodity chemical used to produce a wide range of materials. Hydrogen fluoride is liberated from the mineral by the action of concentrated sulfuric acid See more WebDec 19, 2024 · Relatively dilute hydrothermal fluids that formed in some volcanic rocks can also transport sufficient fluoride to form a high-grade fluorspar deposit. Fluorite has low … gold and crimson viking helmet
Evolution of the Fluoride–Calcium Melt Composition ... - Springer
WebMay 2, 2024 · Fluorite occurs most commonly as a glassy, many-hued vein mineral and is often associated with lead and silver ores; it also … WebApr 7, 2024 · A proposed order of events for this to occur would be as follows: (1) a fluoride-rich fluid precipitates fluorite and primary apatite, (2) a later chloride-rich fluid introduces … WebThe article represents results of the study aimed on sensitivity of balsam poplar (Populus balsamifera L.) leaves to hydrogen fluoride airborne emissions in the vicinity of aluminum smelter. Widespre gold and crosses