Zadovite

Zadovite
General
Category Phosphate minerals
Formula
(repeating unit)		 BaCa6[(SiO4)(PO4)](PO4)2F
Crystal system Trigonal
Unit cell a = 7.0966, c = 25.7284 [Å]; Z = 3
Identification
Color Colorless
Crystal symmetry Trigonal - ditrigonal pyramidal
Point group 3m
Space group R3m
Fracture Irregular/uneven
Luster Vitreous
Streak White
Diaphaneity Transparent
References [1]

Zadovite is an extremely rare mineral with formula BaCa6[(SiO4)(PO4)](PO4)2F. Together with its vanadium-analogue, aradite, zadovite occur in paralavas (type of pyrometamorphic rocks). Both minerals have structures similar to nabimusaite, and these three minerals come from the Hatrurim Formation, Israel. Structure of all three minerals is related to that of hatrurite. Minerals combining barium, phosphorus and silicon together are scarce.[2][3][1]

References

  1. 1 2 "Aradite: Aradite mineral information and data". Mindat.org. Retrieved 2016-03-02.
  2. ↑ Galuskin, E.V., Gfeller, F., Galuskina, I.O., Pakhomova, A., Armbruster, T., Vapnik, Y., Włodyka, R., Dzierżanowski, P., and Murashko, M., 2015. New minerals with a modular structure derived from hatrurite from the pyrometamorphic Hatrurim Complex. Part II. Zadovite, BaCa6[(SiO4)(PO4)](PO4)2F and aradite, BaCa6[(SiO4)(VO4)](VO4)2F, from paralavas of the Hatrurim Basin, Negev Desert, Israel. Mineralogical Magazine 79(5), 1073-1087
  3. ↑ Galuskin, E.V., Gfeller, F., Armbruster, T., Galuskina, I.O., Vapnik, Y., Murashko, M., Włodyka, R., and Dzierżanowski, P., 2015. New minerals with a modular structure derived from hatrurite from the pyrometamorphic Hatrurim Complex. Part I. Nabimusaite, KCa12(SiO4)4(SO4)2O2F, from larnite rocks of Jabel Harmun, Palestinian Autonomy, Israel. Mineralogical Magazine 79(5), 1061-1072
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