Tamarugite
Tamarugite (NaAl(SO4)2·6H2O) is a colorless monoclinic sulfate mineral.[1][2]
| Tamarugite | |
|---|---|
| General | |
| Category | Sulfate mineral |
| Formula (repeating unit) | NaAl(SO4)2 · 6H2O |
| 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 | [1][2][3] |
Deposits containing tamarugite are geographically dispersed with occurrences of the mineral on all seven continents (Antarctica, Oceania, North America, South America, Europe, Asia, and Africa).[2] The mineral's name comes from the Tamarugal Pampa locality in Chile.[1][2] It is also known as lapparentite.
See also
References
- Webmineral.com - Tamarugite
- Mindat.org - Tamarugite
- Mereiter, Kurt (15 October 2013). "Redetermination of tamarugite, NaAl(SO 4 ) 2 ·6H 2 O". Acta Crystallographica Section E. 69 (10): i63–i64. doi:10.1107/S1600536813025154. PMID 24098156.
Bibliography
- Palache, P.; Berman H.; Frondel, C. (1960). "Dana's System of Mineralogy, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. (Seventh Edition)" John Wiley and Sons, Inc., New York, pp. 466-468.
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