Tamarugite
Sulfate mineral
From Wikipedia, the free encyclopedia
Tamarugite (NaAl(SO4)2·6H2O) is a colorless monoclinic sulfate mineral.[2][3]
| Tamarugite | |
|---|---|
| |
| General | |
| Category | Sulfate mineral |
| Formula | NaAl(SO4)2 · 6H2O |
| IMA symbol | Tmr[1] |
| Strunz classification | 7.CC.10 |
| Dana classification | 29.5.3.1 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) |
| Space group | P21/a (no. 14) |
| Identification | |
| Color | Colorless |
| Crystal habit | Prismatic, tabular |
| Twinning | Polysynthetic |
| Cleavage | {010} perfect |
| Mohs scale hardness | 3 |
| Luster | Vitreous |
| Diaphaneity | Transparent |
| Specific gravity | 2.07 |
| Density | 2.07 (measured) |
| Optical properties | Biaxial (+), colorless (transmitted light) |
| 2V angle | 60° (measured), 48° (calculated) |
| Solubility | Soluble in water |
| Other characteristics | Slightly astringent and sweet taste |
| References | [2][3][4] |
Deposits containing tamarugite are geographically dispersed with occurrences of the mineral on all seven continents (Antarctica, Oceania, North America, South America, Europe, Asia, Africa).[3] The mineral's name comes from the Tamarugal Pampa locality in Chile.[2][3] It is also known as lapparentite.