Formula: (Mg,Mn)(Al,Fe)(SO4)2F.14H2O
Origin of name: for Nikolai Svyazhin, Russian mineralogist
Crystal system: triclinic
Crystal class: unknown
Twinning:
Unit cell:
Colour: colourless to yellowish
Diaphaneity:
Luster:
Habit: crystals tabular, nodules, 2 to 3 cm
Hardness:
Specific gravity: 1.64 to 1.69
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments: soluble in water
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