Niter

Niter, potassium nitrate, is found as an efflorescence in hot, dry regions. Also known as saltpeter.

History

Activities related to discovery and approval of the group members

Structural context

Niter
Crystal System orthorhombicSpace Group Pnma
a5.413—10.825 (7.2312)
b5.487—18.351 (11.6184)
c6.43—9.156 (6.901)
alpha90
beta90
gamma90—120 (95)
volume238.73—1278.31 (626.3965)

Based on 6 measurements

Chemical context

Stoichiometric formulas

Niter
mindat.org
  • March 13, 2023KNO3
IMA
  • March 13, 2023K(NO3)
mineralogy.rocks
  • Aug. 30, 2022KNO3

Elements recorded on EPMA

5
K
5
N
5
O

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • colorless
    • light yellow
    • light gray
    Color noteOriginal color note from the source
    Colorless or white, light yellow, very light gray
    StreakStreak entities, recognized using a custom trained NER model
      Streak noteOriginal streak note from the source
      White
      Lustre
      Sub-Vitreous
      Fracture
      Irregular/Uneven
      Sub-Conchoidal
      Transparency
      Transparent
      Tenacity
      brittle
      Hardness
      2
      Calculated density
      2.11