Formula: Pb(Cu,Fe)2(AsO4 SO4)2(CO3,H2O)
Origin of name: For Blair Gartrell, Australian discoverer of mineral
Crystal system: Triclinic
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Yellow, greenish yellow
Diaphaneity: Transparent
Luster: Chalky, dull
Habit: Fine-grained coatings and cavity fillings, cryptocrystalline, platelets 1 x 10 µm and powdery incrustations
Hardness:
Specific gravity:
Cleavage: None
Tenacity:
Streak: Yellow
Synonyms/varieties:
Comments: Soluble in concentrated HCl
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