Formula: Ca(UO2)6O4(OH)6 . 8H2O
Origin of name: For Antoine Becquerel, French physicist
Crystal system: Orthorhombic
Crystal class: mm2
Twinning:
Unit cell: a = 13.86 Ǻ, b = 12.38 Ǻ, c = 14.96 Ǻ
Colour: Golden to lemon-yellow, orange-yellow, amber
Luster: Adamantine to greasy
Habit: Crystals prismatic, elongated, or sometimes tabular; fine-grained aggergates
Hardness: 2.5
Specific gravity: 5.14
Cleavage: 4; {001} perfect, {101}, {010} and {110} imperfect
Tenacity:
Streak: Yellow
Synonyms/varieties:
Comments:
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