Grossmanite

General
Category| Mineral
Formula
(repeating unit)| CaTi3+AlSiO6

Grossmanite is a very rare mineral of the pyroxene group,[1] with formula CaTi3+AlSiO6.[2] It is the titanium-dominant member. Grossmanite is unique in being a mineral with trivalent titanium, a feature shared with tistarite, Ti2O3.[3] Titanium in minerals is almost exclusively tetravalent. Grossmanite stands for titanium-analogue of davisite, esseneite and kushiroite – other members of the pyroxene group. Both grossmanite and tistarite come from the famous Allende meteorite.[1]

## References

1. ↑ 1.0 1.1 Mindat, Grossmanite, http://www.mindat.org/min-39426.html
2. ↑ Ma, C., and Rossmann, G.R., 2009: Grossmanite, CaTi3+AlSiO6, a new pyroxene from the Allende meteorite. American Mineralogist 94(10), 1491–1494
3. ↑ Mindat, Tistarite, http://www.mindat.org/min-38695.html

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Titanium minerals

Oxide minerals|

| Simple|

* Anatase
* Brookite
* Geikielite
* Rutile

|

Mixed|

* Aeschynite-(Y)
* Armalcolite
* Betafite
* Euxenite
* Freudenbergite
* Haggertyite
* Ilmenite
* Keilhauite
* Latrappite
* Perovskite
* Polycrase
* Zimbabweite
* Zirconolite
* Zirkelite

Silicate minerals|

* Aenigmatite
* Grossmanite
* Keilhauite
* Lorenzenite
* Melanite
* Nenadkevichite
* Titanite
* Zircophyllite

Other|

* Sabinaite (carbonate mineral)
* Warwickite (borate mineral)

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