Astrolite

Spherical aggregates composed of radiating tabular crystals. Originally described from Pelz quarry, Diabase quarries, Neumark, Reichenbach, Vogtland, Saxony, Germany.

History

Activities related to discovery and approval of the group members

Structural context

Muscovite
Crystal System monoclinicCrystal Class prismaticSpace Group C2/m

Chemical context

Stoichiometric formulas

Astrolite
mindat.org
  • March 13, 2023KAl2(AlSi3O10)(OH)2
Muscovite
mindat.org
  • March 13, 2023KAl2(AlSi3O10)(OH)2
IMA
  • March 13, 2023KAl2(Si3Al)O10(OH)2
mineralogy.rocks
  • Aug. 30, 2022KAl2(Si3Al)O10(OH)2

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • silvery-white
  • colorless
Color noteOriginal color note from the source
White to colorless, silvery-white, and tinged various colors by impurities.
StreakStreak entities, recognized using a custom trained NER model
    Streak noteOriginal streak note from the source
    White
    Lustre
    Vitreous
    Silky
    Pearly
    Fracture
    Micaceous
    Transparency
    Transparent
    Translucent
    Tenacity
    elastic
    Hardness
    2.5
    Measured density
    2.77—2.88
    Calculated density
    2.83