Formula: Pb7Cu2(SO4)(SiO4)2(OH)2
Origin of name: for Edgar Theodore Wherry (1885-1982), mineralogist and plant ecologist; President of the Mineralogical Society of America (1923).
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 20.82 Å, b = 5.79 Å, c = 9.17 Å, b = 91.3°
Colour: Light green, pale yellow, bright yellowish green
Diaphaneity: Transparent to translucent
Luster: Vitreous - adamantine
Habit: Crystals equidimensional and fibrous to acicular, to 0.4 mm, massive, fine granular
Hardness:
Specific gravity: 6.45
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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