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Willhendersonite Thomsonite & Ettringite

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ZLT128841

Willhendersonite Thomsonite & Ettringite

Type Locality

Description Tabs

Description
Locality: 
Caspar Quarry, Bellerberg, Ettringen, Eifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
Size Range: 
Small miniature (3-4.5 cm)
Size: 
1.9 × 3.2 × 3 cm
Description

Fraction of a limestone xenolth with many exceptional tabular willhendersonite crystals associated with thomsonite balls and ettringite (type location). Very good example for that paragenesis.

Mineral Data
What's on the rock

Willhendersonite

Formula: 
KCa[Al3Si3O12]·5H2O
Strunz: 
9.GD.10
Hardness: 
3.0
Streak: 
White
Type Locality: 
Vispi Quarry (incl. Celli; Pian di Celle), San Venanzo, Terni Province, Umbria, Italy

Thomsonite

Synonym Of: 

Thomsonite-Ca

Formula: 
NaCa2[Al5Si5O20]·6H2O
Strunz: 
9.GA.10
Hardness: 
5.0 - 5.5

Thomsonite-Sr

Formula: 
Na(Sr,Ca)2[Al5Si5O20]·7H2O
Strunz: 
9.GA.10
Hardness: 
5.0 - 0.0

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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