Formula: FeAl(PO4)(OH)2 . H2O
Origin of name: For J. Children, British physician and naturalist
Crystal system: Orthorhombic
Crystal class: mm2
Twinning:
Unit cell: a = 10.41 Ǻ, b = 13.42 Ǻ, c = 6.92 Ǻ
Colour: Brown and yellowish brown
Diaphaneity:
Luster: Vitreous to resinous
Habit: Crystals equant or pyramidal to short prismatic, or platy
Hardness: 5
Specific gravity: 3.20
Cleavage: 1; {100} poor
Tenacity: Subconchoidal, uneven
Streak:
Synonyms/varieties:
Comments: Series with eosphorite
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