Fynchenite

Structural context

Britholite-(Ce)
Crystal System hexagonalCrystal Class hexagonal dipyramidalSpace Group P63/m

Chemical context

Stoichiometric formulas

Thorian Britholite-(Ce)
mindat.org
  • March 13, 2023(Na,Ca,Ce,Th)5(P,Si)3O12(OH,F)
mineralogy.rocks
  • Aug. 30, 2022(Na,Ca,Ce3+,Th4+)5(SiO4,PO4)3(OH,F)
Britholite-(Ce)
mindat.org
  • March 13, 2023(Ce,Ca)5(SiO4)3OH
IMA
  • March 13, 2023(Ce,Ca)5(SiO4)3(OH)
mineralogy.rocks
  • Aug. 30, 2022(Ce3+,Ca)5(SiO4)3OH

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • colorless
  • pale pink
  • pale blue
  • greenish brown
  • resin brown
      Color noteOriginal color note from the source
      Colorless, pale pink to pink, pale blue, brown, greenish brown, yellow, resin brown, black.
      Lustre
      Vitreous
      Greasy
      Fracture
      Conchoidal
      Transparency
      Transparent
      Translucent
      Opaque
      Hardness
      5.5
      Measured density
      4.2—4.69
      Calculated density
      4.65