Tamarugite

Tamarugite (NaAl(SO4)2·6H2O) is a colorless monoclinic sulfate mineral.[1][2]

Tamarugite
General
CategorySulfate mineral
Formula
(repeating unit)		NaAl(SO4)2 · 6H2O
Strunz classification7.CC.10
Dana classification29.5.3.1
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
Space groupP21/a (no. 14)
Identification
ColorColorless
Crystal habitPrismatic, tabular
TwinningPolysynthetic
Cleavage{010} perfect
Mohs scale hardness3
LusterVitreous
DiaphaneityTransparent
Specific gravity2.07
Density2.07 (measured)
Optical propertiesBiaxial (+), colorless (transmitted light)
2V angle60° (measured), 48° (calculated)
SolubilitySoluble in water
Other characteristicsSlightly 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. 


This article uses material from the Wikipedia article
 Metasyntactic variable, which is released under the 
Creative Commons
Attribution-ShareAlike 3.0 Unported License.