Formula: Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2
Origin of name: after locality, Nanping area, China
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: white to silver-white
Diaphaneity: transparent
Luster: vitreous
Habit: plates and scales to 10 mm across, radiating and comb aggregates, rare as pseudohexagonal crystals
Hardness: 2 to 3
Specific gravity: 3.11
Cleavage: 1; {001} excellent
Tenacity:
Streak: white
Synonyms/varieties:
Comments: Cs analogue of muscovite
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