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Crossite

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Crossite
Crossite from California
General
CategoryAmphibole - Inosilicates
Formula
(repeating unit)		Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2
Identification
Colorblue, blue-green
Mohs scale hardness6
Streaklight blue

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)
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