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List Of Minerals Recognized By The International Mineralogical Association (Y–Z)
__TOC__ Y # Yafsoanite (garnet: IMA1981-022) 4.CC.2 (IUPAC: tricalcium ditellurium(IV) tri(tetraoxozincate)) # Yagiite (milarite: IMA1968-020) 9.CM.0 # Yakhontovite (montmorillonite, smectite: IMA1984-032a) 9.EC.4 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yingjiangite - Tirpersdorf, Oelsnitz, Vogtland, Sachsen, Deutschland (J
Yingjiangite is a mineral named after its type locality in the Yingjiang county in 1990. It is a member of the phosphuranylite group, although the species was doubted by two geologists. It is easily confused with phosphuranylite, though the two geologists (José Moacyr Vianna Coutinho and Daniel Atencio) claim that the mineral might be identical to it, even though yingjiangite was approved in 1989-1990 by the International Mineralogical Association, IMA. Properties This mineral has Pleochroism, pleochroic attributes, which is an optical phenomenon that makes the mineral seem to be a different color depending on the axis it is inspected on. On the x axis, the mineral seems to be almost colorless, on the y it is pale yellow, and on the z it can be seen as a yellow mineral. It is also fluorescent, meaning that it emits light when exposed to a certain type of light (in most cases ultraviolet), or either when it absorbs electromagnetic radiation. The fluorescent attribute of is due to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yingjiangite
Yingjiangite is a mineral named after its type locality in the Yingjiang county in 1990. It is a member of the phosphuranylite group, although the species was doubted by two geologists. It is easily confused with phosphuranylite, though the two geologists (José Moacyr Vianna Coutinho and Daniel Atencio) claim that the mineral might be identical to it, even though yingjiangite was approved in 1989-1990 by the IMA. Properties This mineral has pleochroic attributes, which is an optical phenomenon that makes the mineral seem to be a different color depending on the axis it is inspected on. On the x axis, the mineral seems to be almost colorless, on the y it is pale yellow, and on the z it can be seen as a yellow mineral. It is also fluorescent, meaning that it emits light when exposed to a certain type of light (in most cases ultraviolet), or either when it absorbs electromagnetic radiation. The fluorescent attribute of is due to the mineral being uranium based. Both under short a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yegorovite
Yegorovite, ( a4[Si4O8(OH)4·7H2O]) is a silicate mineral found in a hyperalkaline pegmatite in the Lovozero Pluton at Mt. Kedykverpakhk in the Kola Peninsula of Russia. It was named in memory of Russian crystallographer Yurii Kavdievich Yegorov-Tismenko, and approved by the Commission on New Minerals and Mineral Names, International Mineralogical Association in 2008. Physical properties Yegorovite is colorless, with a white streak. Found in small quantities among pegmatites. It is a natural silicate of alkali cation An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by convent ...s. Chemical composition The chemical composition of yegorovite in elemental weight percent is as follows: Crystal structure The crystal structure of yegorovite is made up of a single chain of four silicon (Si) tetrah ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ye'elimite
Ye'elimite is the naturally occurring form of anhydrous calcium sulfoaluminate, . It gets its name from Har Ye'elim in Israel in the Hatrurim Basin west of the Dead Sea where it was first found in nature by Shulamit Gross, an Israeli mineralogist and geologist who studied the Hatrurim Formation. The mineral is cubic, with 16 formula units per unit cell, and a cell dimension of 1.8392 nm, and is readily detected and quantified in mixtures by powder x-ray diffraction. Occurrence in cement It is alternatively called "Klein's Compound", after Alexander Klein of the University of California, Berkeley, who experimented with sulfoaluminate cements around 1960, although it was first described in 1957 by Ragozina. Ye'elimite is most commonly encountered as a constituent of sulfoaluminate cements, in which it is manufactured on the million-tonne-per-annum scale. It also occasionally occurs adventitiously in Portland-type cements.A E Moore, ''Cement Technology'', 7 (1976) pp 85, 134 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
