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Siwaqaite

About

The Cr (chromate) analogue of ettringite. First chromate-dominant group member. First chromate mineral to combine Ca and Al.

Type Locality
North Siwaqa, Daba-Siwaqa, Transjordan Plateau, Amman, Jordan
Mineral Data
Ca6Al2(CrO4)3(OH)12·26H2O
Physical Properties
Crystal System: 
Trigonal
Synonyms
Synonyms: 
IMA2018-150