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Thénardite
Mineral Data
Na
2
SO
4
Strunz:
6/A.07-10
Physical Properties
Colour:
Colourless, very light grey, light brown; colourless in transmitted light
Crystal System:
Orthorhombic
Hardness:
2½ - 3
Tenacity:
Brittle
Synonyms
Synonyms:
Pyrotechnite and Thenardite
