Ruizite
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Ruizite is a sorosilicate mineral with formula Ca2Mn2Si4O11(OH)4·2H2O. It was discovered at the Christmas mine in Christmas, Arizona, and described in 1977. The mineral is named for discoverer Joe Ana Ruiz.
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Ruizite | |
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General | |
Category | Sorosilicate |
Formula (repeating unit) | Ca2Mn2Si4O11(OH)4·2H2O[1] |
IMA symbol | Rz[2] |
Strunz classification | 9.BJ.35 |
Dana classification | 57.2.2.1 |
Crystal system | Monoclinic |
Crystal class | Prismatic (2/m) (same H-M symbol) |
Space group | P21/c |
Unit cell | a = 11.95 Å, b = 6.17 Å c = 9.03 Å, β = 91.37°; Z = 4 |
Identification | |
Color | Orange, red-brown |
Twinning | Common on {100} |
Mohs scale hardness | 5 |
Streak | Apricot |
Diaphaneity | Translucent |
Optical properties | Biaxial (-) |
Refractive index | nα = 1.663 nβ = 1.715 nγ = 1.734 |
Birefringence | δ = 0.071 |
2V angle | 60° |
References | [3] |
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