Input interpretation
admontite (mineral) | hilgardite (mineral)
Images
Images
General properties
| admontite | hilgardite alternate names | (none) | hilgardite-1tc formula | MgB_6O_10·7(H_2O) | Ca_2B_5O_9Cl·(H_2O) discovery year | 1979 | 1937
Basic properties
| admontite | hilgardite density | 1.845 g/cm^3 | 2.69 g/cm^3 transparency | transparent | transparent birefringence | 0.062 | 0.034 luster | vitreous | vitreous Mohs hardness | 5/2 | 5 streak | white | white magnetism | nonmagnetic | nonmagnetic color | colorless | colorless fracture | conchoidal | molar mass | 375.3 g/mol | 331.7 g/mol
Units
Mineral identifiers
| admontite | hilgardite Strunz ID | V/H.17-10 | V/K.04-10 Dana ID | 26.6.3.1 | 26.5.14.1 IMA number | IMA1978-012 | ICSD number | ICSD34190 |
Crystallographic properties
| admontite | hilgardite crystal system | monoclinic | triclinic crystal class | 2/m | 1 unit cell volume | 1361 Å^3 (cubic ångströms) | 198.5 Å^3 (cubic ångströms) d-spacing | 7.6 Å (ångströms) | 2.68 Å (ångströms) | 12.08 Å (ångströms) | 2.88 Å (ångströms) | 2.827 Å (ångströms) | 2.029 Å (ångströms) intensity | 100% | 90% | 90% | 100% | 83% | 64% molecules per unit cell | 4 molecules per cell | 1 molecule per cell 2V angle | π/6 radians≈30° (degrees) | 29 π/120 radians≈87/2° (degrees) refractive indices | 1.442 | 0 | 0 | 0 | 0 | 0 | 1.63 | 0 | 0 | 0 | 0 | 0 dispersion | none | r > v unit cell lengths | 12.68 Å (ångströms) | 10.07 Å (ångströms) | 11.32 Å (ångströms) | 6.297 Å (ångströms) | 6.464 Å (ångströms) | 6.565 Å (ångströms) unit cell angles | 90° (degrees) | 109.7° (degrees) | 90° (degrees) | 74.24° (degrees) | 61.68° (degrees) | 61.26° (degrees)
Wikipedia summary
Admontite
Admontite is a hydrated magnesium borate mineral with formula MgB_6O_10·7H_2O.
Hilgardite
Hilgardite is a borate mineral with the chemical formula Ca_2B_5O_9Cl·H_2O. It is transparent and has vitreous luster. It is colorless to light pink with a white streak. It is rated 5 on the Mohs Scale. It crystallizes in the triclinic crystal system. Crystals occur as distorted tabular triangles and are hemimorphic, polytypes exist.