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Manandonite & Hydrokenopyrochlore

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SMM730973

Manandonite & Hydrokenopyrochlore

Type Locality

Description Tabs

Description
Locality: 
Antandrokomby Pegmatite, Manandona Valley, Ambositra, Amoron'i Mania, Madagascar
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3 × 2 cm
Description

Many rounded groups of tabular crystals of manandonite, cover almost entirely a quartz matrix, here and there are nested some gray, prismatic crystals of hydrokenopyrochlore. Manandonite is a not very common mineral of the Kaolinite-Serpentine Group, found only in three locations worldwide, all in Madagascar. Hhydrokenopyrochlore is exclusive of this locality that is for both the species the their type-locality.

 

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Mineral Data
What's on the rock

Manandonite

Formula: 
Li2Al4(Si2AlB)O10(OH)8
Strunz: 
9.ED.15
Hardness: 
2.5 - 3.5
Type Locality: 
Antandrokomby pegmatite, Manandona Valley, Sahatany Pegmatite Field (Mt Ibity area), Vakinankaratra Region, Antananarivo Province, Madagascar

Hydrokenopyrochlore

Formula: 
2Nb2O4(OH)2(H2O)
Group Parent: 
Pyrochlore Group
Crystal System: 
Isometric
Type Locality: 
Antandrokomby, Manandona Valley, Sahatany, Antananarivo Province, Madagascar

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