Mineral Information and Data:

Niter
KNO3 [CNMNC approved formula]

Named derived from Herbraic neter, used in ancient times for alkaline salts extracted by water from vegetable ashes.

IMA status : Valid species (Pre-IMA) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
18.01.02.01  
  (18) Simple Nitrates
  (18.01) where A xNO3 · x(H2O), x can equal zero
  (18.01.02) Niter Series
  
Nickel-Strunz
(10th edition) :
05.NA.10
  (05) Carbonates and Nitrates
  (05.N) Nitrates
  (05.NA) Without OH or H2O
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  
Other Properties: H2O Soluble.

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