Formula: HAl(UO2)4(PO4)4.16H2O
Origin of name: after locality Sabugal County, Beira Alta, Portugal
Crystal system: monoclinic, pseudotetragonal
Crystal class: 2/m
Twinning:
Unit cell:
Colour: bright yellow to lemon-yellow
Diaphaneity: transparent to translucent
Luster: vitreous (weakly)
Habit: crystals square or lath-like plates, to 0.1 mm, crusts, densely aggregated
Hardness: 2.5
Specific gravity: 3.2
Cleavage: 1; {001} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: fluoresces lemon-yellow
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