albite vs shafranovskite

albite (mineral) | shafranovskite (mineral)

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| albite | shafranovskite alternate names | ab100 | acid plagioclase | cleavelandite | cryptoclase | hyposclerite | kieselspath | olafite | sodaclase | soda feldspar | white feldspar | zygadite | (none) formula | NaAlSi_3O_8 | K_2Na_3(Mn^(2+), Fe^(2+), Na)_4[Si_9(O, OH)_27](OH)_2·n(H_2O)(n~2.33) discovery year | 1815 | 1982

| albite | shafranovskite density | 2.62 g/cm^3 | 2.77 g/cm^3 transparency | transparent | translucent | subtranslucent | translucent birefringence | 0.0095 | 0.017 luster | vitreous | vitreous Mohs hardness | 6.25 | 5/2 tenacity | brittle | streak | white | greenish white magnetism | nonmagnetic | nonmagnetic color | white | gray | greenish gray | bluish green | gray | yellow green | yellow orange | olive green fracture | uneven | conchoidal molar mass | 263 g/mol | 1052 g/mol

| albite | shafranovskite Strunz ID | VIII/J.07-20 | VIII/D.16-20 Dana ID | 76.1.3.1 | 78.3.2.1 IMA number | | IMA1981-048

| albite | shafranovskite crystal system | triclinic | trigonal crystal class | 1 | 3m unit cell volume | 664.4 Å^3 (cubic ångströms) | 3845 Å^3 (cubic ångströms) d-spacing | 3.176 Å (ångströms) | 3.211 Å (ångströms) | 3.752 Å (ångströms) | 10.54 Å (ångströms) | 3.51 Å (ångströms) | 2.787 Å (ångströms) intensity | 100% | 30% | 30% | 100% | 70% | 60% molecules per unit cell | 4 molecules per cell | 6 molecules per cell 2V angle | 127 π/360 radians≈127/2° (degrees) | refractive indices | 1.531 | 1.534 | 1.54 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.57 | 0 dispersion | weak | unit cell lengths | 8.144 Å (ångströms) | 12.79 Å (ångströms) | 7.16 Å (ångströms) | 14.52 Å (ångströms) | 21.06 Å (ångströms) | 21.06 Å (ångströms) unit cell angles | 94.27° (degrees) | 116.6° (degrees) | 87.67° (degrees) | 90° (degrees) | 90° (degrees) | 120° (degrees)

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.