Plagioclase
Na(AlSi3O8) * Ca(Al2Si2O8)
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Chemical name
Plagioclase |
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Chemical formula
Na(AlSi3O8) * Ca(Al2Si2O8) |
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Crystal system
triclinic |
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Molecular weight [g/mol]
270.77 |
|
Mohs hardness
6 - 6,5 |
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Density [g/cm3]
2.6 - 2.7 |
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Cleavage
(001) perfect, (010) good |
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Color
White, gray, bluish white |
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Streak
White |
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Transparency
Transparent to translucent |
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Luster
Vitreous |
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Refractive Index
Albite: nα 1.527, nβ 1.532 nΥ 1.538
Anorthite: nα 1.577 nβ 1.585 nΥ 1.590 |
