Formula: NaMnZn2(Ti,Fe)6Ti12O38
Origin of name: For Lev Landau, Russian physicist
Crystal system: Monoclinic, pseudotrigonal
Crystal class: -3
Twinning:
Unit cell:
Colour: Black
Diaphaneity: Opaque
Luster: Semimetallic
Habit: Fine-grained aggregates to 1 mm, irregular form
Hardness: 7.5
Specific gravity: 4.42
Cleavage: None
Tenacity:
Streak: Gray
Synonyms/varieties:
Comments:
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