Input interpretation
behierite (mineral) | tyretskite (mineral)
Images
Images
General properties
| behierite | tyretskite formula | (Ta, Nb)BO_4 | Ca_2B_5O_9(OH)·(H_2O) discovery year | 1960 |
Basic properties
| behierite | tyretskite density | 7.86 g/cm^3 | 2.189 g/cm^3 transparency | | transparent birefringence | | 0.033 luster | adamantine | vitreous Mohs hardness | 7.25 | 5 streak | white | white magnetism | nonmagnetic | nonmagnetic color | pink gray | brownish | brownish white | white fracture | conchoidal | molar mass | 233.8 g/mol | 313.2 g/mol
Units
Mineral identifiers
| behierite | tyretskite Strunz ID | V/G.07-20 | V/K.04-30 Dana ID | 24.1.2.1 | 26.5.15.1 ICSD number | ICSD63202 |
Crystallographic properties
| behierite | tyretskite crystal system | tetragonal | triclinic crystal class | 4/m2/m2/m | 1 unit cell volume | 210.8 Å^3 (cubic ångströms) | 198.5 Å^3 (cubic ångströms) d-spacing | 4.1 Å (ångströms) | 2.327 Å (ångströms) | 3.1 Å (ångströms) | 2.86 Å (ångströms) | 2.93 Å (ångströms) | 2.14 Å (ångströms) intensity | 100% | 71% | 71% | 100% | 100% | 90% molecules per unit cell | 4 molecules per cell | 1 molecule per cell 2V angle | | 7 π/20 radians≈63° (degrees) refractive indices | | 1.637 | 0 | 0 | 0 | 0 | 0 dispersion | | r < v | r > v unit cell lengths | 6.206 Å (ångströms) | 6.206 Å (ångströms) | 5.472 Å (ångströms) | 6.3 Å (ångströms) | 6.47 Å (ångströms) | 6.56 Å (ångströms) unit cell angles | 90° (degrees) | 90° (degrees) | 90° (degrees) | 74.27° (degrees) | 61.6° (degrees) | 61.25° (degrees)