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Sodalite Var Hackmanite

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HAN961061

Sodalite Var Hackmanite

Fluorescent

Description Tabs

Description
Locality: 
Koksha Valley, Badakhshan Province, Afghanistan
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
1.7 × 3.2 × 1.5 cm
Weight: 
12.00gr
Description

Fluorescent and tenebrescent Sodalite var Hackmanite - orange UV LW. purple  Tenebrescence  after exposure to UV and sunlight.- 1st photo UV LW and visible light.

Pink to grey white to white photochrome variety of sodalite containing some S. Occasionally not enough S to be detectable with EDS (<1%). The S content can give sodalite reversible photochromism or tenebrescence. The fluorescent community reserve the name hackmanite for tenebrescent sodalites.
Hackmanite shows orange colored photoluminescence in UV light, exhibits a purple-red colour subsequently to UV irradiation or after cracking, bleaches within minutes to hours in visible light, and usually recovers colour in darkness (Goettlicher et al., 2013).

Mineral Data
What's on the rock

Sodalite

Formula: 
Na8(Al6Si6O24)Cl2
Strunz: 
9.FB.10
Crystal System: 
Isometric
Hardness: 
5.5 - 6.0
Streak: 
White
Type Locality: 
Ilímaussaq complex, Narsaq, Kujalleq, Greenland

Hackmanite

Variety Of: 

Sodalite

Formula: 
Na8(Al6Si6O24)Cl2
Strunz: 
9.FB.10
Hardness: 
5.5 - 6.0
Formula: 
Na8Al6Si6O24(Cl2,S)
Hardness: 
0.0

Seller Information

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