Formula: Sr2Ba2(Na,Fe)2Ti2Si8O24(O,OH)2.H2O
Origin of name: from strontium, orthorhombic structure and joaquinite
Crystal system: orthorhombic
Crystal class: mm2
Twinning:
Unit cell:
Colour: yellow-brown
Diaphaneity: semitransparent
Luster:
Habit: crystals, angular anhedral to 2 mm, aggregates and lenses
Hardness: 5.5
Specific gravity: 3.62
Cleavage: 1; {001} good
Tenacity:
Streak:
Synonyms/varieties:
Comments: dimorphous with strontiojoaquinite
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