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Frankamenite & Simpsonite

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ESM577323

Frankamenite & Simpsonite

Type Locality

Description Tabs

Description
Locality: 
Murunskii Massif, Aldan Shield, Sakha Republic, Russian Federation
Class: 
Combination
Size Range: 
Small miniature (3-4.5 cm)
Size: 
1.3 × 3 × 2.5 cm
Description

Greenish-grey frankamenite intergrown with pale lilac charoite

Mineral Data
What's on the rock

Frankamenite

Formula: 
K3Na3Ca5(Si12O30)(F,OH)4·H2O
Strunz: 
9.DG.90
Crystal System: 
Triclinic
Hardness: 
5.5
Type Locality: 
Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Sakha Republic (Saha Republic; Yakutia), Eastern-Siberian Region, Russia

Simpsonite

Formula: 
Al4(Ta,Nb)3O13(OH,F)
Strunz: 
4.DC.10
Crystal System: 
Hexagonal
Hardness: 
7.0 - 7.5
Streak: 
white
Type Locality: 
Tabba Tabba pegmatite, Wallareenya Station, Port Hedland Shire, Western Australia, Australia