Kushiroite

Short description: Pyroxene, inosilicate mineral

Kushiroite

General
Category| Mineral
Formula
(repeating unit)| CaAlAlSiO6

Kushiroite is a rare mineral of the pyroxene group, with formula CaAlAlSiO6. It is the fully aluminian member. The formula of kushiroite corresponds to the molecule (or component) known as Calcium-Tschermak (Ca-Tschermak), which dominates in the composition of kushiroite. Kushiroite is an aluminium-analogue of other pyroxene-group members, davisite, esseneite, and grossmanite. It was found in a chondrite meteorite within refractory inclusions.[1][2]

The mineral crystallizes in the monoclinic crystal system (space group C2/c).[3]

## References

1. ↑ Kimura, M., Mikouchi, T., Suzuki, A., Miyahara, M., Ohtani, E., and El Goresy, A., 2009, Kushiroite, CaAlAlSiO6: A new mineral of the pyroxene group from the ALH 85085 CH chondrite, and its genetic significance in refractory inclusions. American Mineralogist 94(10), 1479-1482.
2. ↑ "Kushiroite: Kushiroite mineral information and data". http://www.mindat.org/min-39329.html. Retrieved 2016-03-02.
3. ↑ Okamura, F.P.; Ghose, S.; Ohashi, H. (1974). "Structure and crystal chemistry of calcium Tschermak's pyroxene, CaAlAlSiO6". American Mineralogist 59: 549–557. https://pubs.geoscienceworld.org/msa/ammin/article-abstract/59/5-6/549/541077. Retrieved 30 December 2020.

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