Formula: Pb2(Fe,Mn)Te(AlSi3)O12(OH)2 . H2O
Origin of name: For Carlos Burckhardt, Mexican geologist
Crystal system: Monoclinic pseudohexagonal
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Carmine to violet-red, pink
Diaphaneity:
Luster: Adamantine to pearly
Habit: Crystals microscopic hexagonal or pseudohexagonal, rare; rosettes
Hardness: 2
Specific gravity: 4.96
Cleavage: 1; {001} perfect
Tenacity:
Streak: Pale red
Synonyms/varieties:
Comments:
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