Mineral Information and Data:

Grayite  
(Th,Pb,Ca)PO4 • H2O [CNMNC approved formula]

Named for Anton Gray, mining engineer, advisor to U. K. Atomic Energy Authority.

IMA status : Valid species (Pre-IMA 1957) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
40.04.07.04  
  (40) Hydrated Phosphates
  (40.04) where A+++ XO4 · x(H2O)
  (40.04.07) Rhabdophane Group
  
Nickel-Strunz
(10th edition) :
08.CJ.45
  (08) Phosphates, Arsenates, Vanadates
  (08.C) Phosphates without Additional Anions, with H2O
  (08.CJ) With only large cations
  
Crystal system: Hexagonal System
Point group (H-M): 622 — trapezoidal
  
  
  
Other Properties: Radioactive.
Comments: Radioactive.

<<< BACK TO MINERAL SEARCH