Input interpretation
albite (mineral)
Image
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General properties
alternate names | ab100 | acid plagioclase | cleavelandite | cryptoclase | hyposclerite | kieselspath | olafite | sodaclase | soda feldspar | white feldspar | zygadite formula | NaAlSi_3O_8 discovery year | 1815
Basic properties
density | 2.62 g/cm^3 transparency | transparent | translucent | subtranslucent birefringence | 0.0095 luster | vitreous Mohs hardness | 6.25 tenacity | brittle streak | white magnetism | nonmagnetic color | white | gray | greenish gray | bluish green | gray fracture | uneven molar mass | 263 g/mol (grams per mole)
Units
Mineral identifiers
Strunz ID | VIII/J.07-20 Dana ID | 76.1.3.1
Crystallographic properties
crystal system | triclinic crystal class | 1 unit cell volume | 664.4 Å^3 (cubic ångströms) d-spacing | 3.176 Å (ångströms) | 3.211 Å (ångströms) | 3.752 Å (ångströms) intensity | 100% | 30% | 30% molecules per unit cell | 4 molecules per cell 2V angle | 127 π/360 radians≈127/2° (degrees) refractive indices | 1.531 | 1.534 | 1.54 | 0 | 0 | 0 dispersion | weak unit cell lengths | 8.144 Å (ångströms) | 12.79 Å (ångströms) | 7.16 Å (ångströms) unit cell angles | 94.27° (degrees) | 116.6° (degrees) | 87.67° (degrees)
Wikipedia summary
Albite is a plagioclase feldspar mineral. It is the sodium endmember of the plagioclase solid solution series. It represents a plagioclase with less than 10% anorthite content. The pure albite endmember has the formula NaAlSi_3O_8. It is a tectosilicate. Its color is usually pure white, hence its name from Latin albus. It is a common constituent in felsic rocks.