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Atencioite Hydroxylherderite & Eosphorite

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SER870989

Atencioite Hydroxylherderite & Eosphorite

Description Tabs

Description
Locality: 
Poço d'Antas Claim, Piauí Valley, Itinga, Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.6 × 5.1 × 4.1 cm
Description

a large extremely rich specimen featuring thousands tiny, apple green tabular atencioite crystals with several yellow hydroxylherderite crystals and some brown elongated eosphorite crystals

Mineral Data
What's on the rock

Atencioite

Formula: 
Ca2Fe2+3Mg2Be4(PO4)6(OH)4·6H2O
Strunz: 
8.DA.10
Hardness: 
0.0
Type Locality: 
Linópolis, Divino das Laranjeiras, Doce valley, Minas Gerais, Brazil

Hydroxylherderite

Formula: 
CaBe(PO4)(OH,F)
Strunz: 
8.BA.10
Crystal System: 
Monoclinic
Hardness: 
5.0 - 5.5
Streak: 
white

Eosphorite

Formula: 
(Mn2+,Fe2+)Al(PO4)(OH)2·H2O
Strunz: 
8.DD.20
Crystal System: 
Orthorhombic
Hardness: 
5.0
Streak: 
White
Type Locality: 
Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield Co., Connecticut, USA