Troostite

A Mn-bearing variety of willemite with MnO contents above 3 mass% (up to 12 mass% and may be more).

Structural context

Willemite
Crystal System trigonalCrystal Class rhombohedralSpace Group R-3

Chemical context

Stoichiometric formulas

Troostite
mindat.org
  • March 13, 2023(Zn,Mn)2SiO4
mineralogy.rocks
  • Aug. 30, 2022(Zn,Mn2+)2SiO4
Willemite
mindat.org
  • March 13, 2023Zn2SiO4
IMA
  • March 13, 2023Zn2SiO4
mineralogy.rocks
  • Aug. 30, 2022Zn2SiO4

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • colorless
    • pastel green
    • apple-green
    • light blue
    • azure-blue
      • burgundy-red
      • mahogany-brown
      • gray
          Color noteOriginal color note from the source
          Colorless, white, pastel green, apple-green, light blue, azure-blue, yellow, burgundy-red, brown, mahogany-brown, gray, black, pink
          StreakStreak entities, recognized using a custom trained NER model
            Streak noteOriginal streak note from the source
            White
            Lustre
            Vitreous
            Resinous
            Fracture
            Irregular/Uneven
            Sub-Conchoidal
            Transparency
            Transparent
            Translucent
            Tenacity
            brittle
            Hardness
            5.5
            Measured density
            3.89—4.19
            Calculated density
            4.224