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Portlandite & Ettringite

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SKY533585

Portlandite & Ettringite

Classic Locality

Description Tabs

Description
Locality: 
Bellerberg, Ettringen, Eifel Mountains, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.5 × 2 cm
Description

Outstanding portlandite crystals associated to acicular white ettringite and afwillite from the famous locality Ettringer-Bellerberg, the type locality for Ettringite.

Mineral Data
What's on the rock

Portlandite

Formula: 
Ca(OH)2
Strunz: 
4.FE.05
Hardness: 
2.5 - 3.0
Type Locality: 
Scawt Hill, Larne, Co. Antrim, Northern Ireland, UK

Ettringite

Formula: 
Ca6Al2(SO4)3(OH)12·26H2O
Strunz: 
7.DG.15
Hardness: 
2.0 - 2.5
Type Locality: 
Ettringer Feld, Western lava flow, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany

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