Mineralpedia Details for Jinshajiangite

Named after the Jinshajiang River in China, nearby which lies the type locality at the Luku Rare Earth Element deposit. It is a rare mineral that occurs only at its type locality and at Norra Karr in Sweden. It occurs in arfvedsonite dikes in alkalic syenite. Additional associated minerals include albite, afrvedsonite, aegirine, pyrochlore, monazite, and chevkinite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/jinshajiangite.pdf

Formula

NaBaFe²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F 

Crystal System

Monoclinic 

Crystal Habit

Thin, Tabular 

Cleavage

Perfect, Perfect, None 

Luster

Vitreous (Glassy) 

Color

brown red, yellow red, black, black red 

Streak

light yellow 

Class

Monoclinic 

Fracture

Uneven 

Hardness

4.5-5 

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Mindat

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Reddish brown platy crystal to less than 1mm embedded in matrix.