Tamarugite

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.

See also

• List of minerals