GEOL 2540 Lecture Notes - Lecture 22: Siderite, Magnesite, Axinite
14 Apr 2016
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Document Summary
Phosphates, arsenates and vanadates (po4)3-, (aso4)3-, and (vo4)3- radicals. Y = y+ dy+ er+ yb+ lu ( heavy ree) y. Xenotime and monazite occur in small concentrations in: Use: rare-earth ores (ree are used in a wide variety of industrial applications, from abrasives to solid state lasers and permanent magnets) solid-state lasers and permanent magnets) Apatite group: hexagonal phosphates, arsenates and vanadates of ca, pb and other. * gneisses, skarns and other metamorphic rocks k k. * biogenic apatite d th t hi (e. g. , skeletal system of vertebrates) Uranyl phosphates/arsenates ( uo2) 2+ (= uranyl cation) Large cation ( ca cu ba k) ( ca, cu, ba, k) Zeunerite cu( uo ) ( aso ) 14h o 6- 8h2o. * oxidation of uraninite and other u minerals meta-torbernite, etc. same formulae, but w ith. Leakage of mobile (puo2) and (uo2)2+into the environment. Corrosion of the container, oxidation of pu4+ and u4+
