Jadarite
Jadarite is a white, earthy monoclinic silicate mineral, sodium lithium boron silicate hydroxide (LiNaSiB3O7(OH) or Na2OLi2O(SiO2)2(B2O3)3H2O).
| Jadarite | |
|---|---|
Jadarite on display at the Natural History Center in Svilajnac, Serbia | |
| General | |
| Category | Nesosilicate |
| Formula (repeating unit) | LiNaSiB3O7OH |
| IMA symbol | Jad |
| Strunz classification | 9.AJ.40 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | P21/n |
| Unit cell | a = 6.816(2), b = 13.789(2) c = 6.758(2) [Å]; β = 111.08(2)°; Z = 4 |
| Identification | |
| Formula mass | 219.46 g/mol |
| Color | White |
| Crystal habit | As microscopic anhedral grains |
| Fracture | Irregular to conchoidal |
| Tenacity | Brittle |
| Mohs scale hardness | 4 - 5 |
| Luster | Dull |
| Streak | White |
| Diaphaneity | Translucent to opaque |
| Specific gravity | 2.45 |
| Optical properties | Biaxial |
| Ultraviolet fluorescence | Weak pink to orange under UV |
| References | |
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