K Richterite

Structural context

Potassic-richterite
Crystal System monoclinicCrystal Class prismaticSpace Group C2/m

Chemical context

Stoichiometric formulas

Potassic-richterite
mindat.org
  • March 13, 2023{K}{CaNa}{Mg5}Si8O22(OH)2The richterite group minerals are defined as sodium-calcium amphiboles with 0,5 apfu < A(Na+K+ 2Ca) where Na or K is dominant, and with C(Al+Fe3++2Ti)<0,5 apfu. The W position may contain (OH),F or Cl. Potassic-richterite is defined with A position: K dominant C position: Mg dominant W position: (OH) dominant.
IMA
  • March 13, 2023K(NaCa)Mg5Si8O22(OH)2
mineralogy.rocks
  • Aug. 30, 2022K(NaCa)Mg5Si8O22(OH)2

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • straw yellow
    Color noteOriginal color note from the source
    Straw yellow to brown colour
    StreakStreak entities, recognized using a custom trained NER model
    • greyish white
    Streak noteOriginal streak note from the source
    Greyish white
    Lustre
    Vitreous
    Transparency
    Translucent
    Tenacity
    brittle
    Hardness
    5—6
    Calculated density
    3.075