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Anorthoclase-Sanidine

A variety of 'Anorthoclase' [Albite]
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Formula:
(Na,K)AlSi3O8
Feldspar Group. An unnecessary name for a variety of Anorthoclase with the tabular habit of sanidine but the optical extinction of Anorthoclase.

Originally reported from Drachenfels, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany.


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Unique IdentifiersHide

Mindat ID:
247 (as Anorthoclase-Sanidine)
96 (as Albite)
Long-form identifier:
mindat:1:1:247:5 (as Anorthoclase-Sanidine)
mindat:1:1:96:9 (as Albite)

Chemistry of Anorthoclase-SanidineHide

Mindat Formula:
(Na,K)AlSi3O8
Element Weights:
Element% weight
O48.812 %
Si32.132 %
Al10.290 %
Na8.767 %

Calculated from ideal end-member formula.
Elements listed:
Al, K, Na, O, Si - search for minerals with similar chemistry

Synonyms of Anorthoclase-SanidineHide

Other Language Names for Anorthoclase-SanidineHide

Other InformationHide

Health Risks:
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 Anorthoclase-SanidineHide

References for Anorthoclase-SanidineHide

Reference List:

Localities for Anorthoclase-SanidineHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Australia
 
  • Northern Territory
    • Victoria-Daly Region
Baumgartner et al. (2025)
Germany
 
  • North Rhine-Westphalia
    • Cologne
      • Rhein-Sieg-Kreis
        • Königswinter
Engels et al. (1936)
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