Tamarugite

Tamarugite (NaAl(SO₄)₂·6H₂O) is a colorless monoclinic sulfate mineral.^[2][3]

Tamarugite
General
Category	Sulfate mineral
Formula (repeating unit)	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.

See also

• List of minerals

References

1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
2. Webmineral.com - Tamarugite
3. Mindat.org - Tamarugite
4. 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. PMC 3790334. PMID 24098156.

• Handbook of Mineralogy

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.