Anorthoclase-Sanidine

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.

Structural context

Anorthoclase
Crystal System triclinic

Chemical context

Stoichiometric formulas

Anorthoclase-Sanidine
mindat.org
  • March 13, 2023(Na,K)AlSi3O8
Anorthoclase
mindat.org
  • March 13, 2023(Na,K)AlSi3O8
mineralogy.rocks
  • Aug. 30, 2022(Na,K)AlSi3O8

Physical properties

ColorColor entities, recognized using a custom trained NER model
    • colourless
    • greyish pink
    Color noteOriginal color note from the source
    White, colourless, greyish pink
    StreakStreak entities, recognized using a custom trained NER model
      Streak noteOriginal streak note from the source
      White
      Hardness
      6—6.5