Formula: HCa4Mg2Al4(SO4)8F9 . 3H2O
Origin of name: For Dan Lannon, American miner
Crystal system: Tetragonal
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Chalky white
Diaphaneity:
Luster:
Habit: Nodules of submicroscopic plates
Hardness: 2
Specific gravity: 2.22
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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