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Hellandite

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SER985642

Hellandite

Description Tabs

Description
Locality: 
Vetralla, Vico Lake, Viterbo Province, Lazio, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 2.3 × 1.5 cm
Description

a group of yellow trasparent hellandite on sanidine

Mineral Data
What's on the rock

Hellandite

Synonym Of: 

Hellandite-(Ce)

Formula: 
(Ca,REE)4Ce2Al(Be,Li)2-xB4Si4O22(OH)2
Strunz: 
9.DK.20
Hardness: 
0.0

Hellandite-(Y)

Formula: 
(Ca,REE)4Y2Al(Be,Li)2-xB4Si4O22(OH)2
Strunz: 
9.DK.20
Hardness: 
5.5