Formula: (Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Origin of name: For W. Burbank, American geologist
Crystal system: Hexagonal
Crystal class: 6mm
Twinning:
Unit cell:
Colour: Colourless, greyish yellow, pink
Diaphaneity:
Luster:
Habit: Crystals slender prismatic; radiating aggregates, cleavable masses
Hardness: ~3.5
Specific gravity: 3.50
Cleavage: 1; {100} distinct to imperfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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