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Ettringite Group

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Big Photo

Sturmanite
N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa
© Mike and Diana Hopkins

Show Ettringite Group Photos (516)





A group of complex Ca-metal-oxysalts involving sulphate, carbonate, borate, silicate and germanate anions.

Classification of Ettringite Group

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Relationship of Ettringite Group to other Species

Group Members:
Bentorite
Ca
 
6
(Cr
3+
 
,Al)
 
2
(SO
 
4
)
 
3
(OH)
 
12
 · 26H
 
2
O
Buryatite
Ca
 
3
(Si,Fe,Al)(SO
 
4
)[B(OH)
 
4
]O(OH)
 
5
 · 12H
 
2
O
Carraraite
Ca
 
3
(SO
 
4
)[Ge(OH)
 
6
](CO
 
3
) · 12H
 
2
O
Charlesite
Ca
 
6
(Al,Si)
 
2
(SO
 
4
)
 
2
[B(OH)
 
4
](OH,O)
 
12
 · 26H
 
2
O
Ettringite
Ca
 
6
Al
 
2
(SO
 
4
)
 
3
(OH)
 
12
 · 26H
 
2
O
Jouravskite
Ca
 
6
Mn
3+
2
(SO
 
4
,CO
 
3
)
 
3
(OH)
 
12
 · 26H
 
2
O
Micheelsenite
(Ca,Y)
 
3
Al(HPO
 
4
,CO
 
3
)(CO
 
3
)(OH)
 
6
 · 12H
 
2
O
Sturmanite
Ca
 
6
(Fe
3+
 
,Al,Mn
3+
 
)
 
2
(SO
 
4
)
 
2
[B(OH)
 
4
](OH)
 
12
 · 25H
 
2
O
Thaumasite
Ca
 
3
(SO
 
4
)[Si(OH)
 
6
](CO
 
3
) · 12H
 
2
O

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Ettringite Group

Search Engines:
  • Look for Ettringite Group on Google
  • Look for Ettringite Group images on Google
    • Mineral Dealers:
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  • Rare and Unusual minerals at Mineralogical Research Company
  • Fine Minerals from Weinrich Minerals, Inc.
  • Pricedownminerals.com - Reverse Auctions and Shop
  • Search for - Ettringite Group - on e-Rocks Mineral Sales & Auctions
  • SpiriferMinerals.com - high quality low prices
  • Fabre Minerals - search for Ettringite Group specimens
  • The Arkenstone - Fine Minerals
  • Find Ettringite Group on www.crystalclassics.co.uk
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Top quality minerals from Kristalle of California
  • Buy fine minerals and gemstones from Pala International
    • Jobs:
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    • Localities for Ettringite Group

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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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    New Locality Added: Davib Süd, Karibib District, Erongo Region, NamibiaFrom Debbie Woolf, 18th Feb 2012 03:21:56