Formula: Pb5(AsO4)3Cl
Origin of name: From Greek for imitator
Crystal system: Hexagonal
Crystal class: 6/m
Twinning:
Unit cell: a = 10.25 Å, c = 7.442 Å
Colour: Pale yellow to yellowish brown, orange-yellow, orange,
Diaphaneity:
Luster: Subadamantine to resinous
Habit: Crystals acicular to slender prismatic; globular, botryoidal, reniform, granular
Hardness: 3.5 to 4
Specific gravity: 7.28
Cleavage: None
Tenacity: Subconchoidal to uneven; brittle
Streak: White
Synonyms/varieties: Campylite (curved crystals var.), gorlandite
Comments: Series with pyromorphite and with vanadinite
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