Crossite

Crossite from California

General
Category| Amphibole – Inosilicates
Formula
(repeating unit)| Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2
Crystal system| Monoclinic
Identification
Color| blue, blue-green
Mohs scale hardness| 6
|re|er}}| Vitreous
Streak| light blue
Diaphaneity| Transparent to translucent
Specific gravity| 3.16
Optical properties| Biaxial (-)

Crossite is an inosilicate double chain sodic amphibole and is a rare silicate mineral belonging to the riebeckite group. It is considered an intermediate between the amphiboles glaucophane and magnesioriebeckite, which form a series.[1] IMA status: discredited 1997.

Crossite is named after Charles Whitman Cross, an American USGS petrologist.

## References

1. ↑ RIEBECKITE (Sodium Iron Magnesium Silicate Hydroxide)

## External links

* Crossite on Mindat
* Crossite on Webmineral

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