1) Ammonium mineral
Found on
https://www.crosswordclues.com/clue/buddingtonite
Buddingtonite is an ammonium feldspar with formula: NH4AlSi3O8 (note: some sources add 0.5H2O to the formula). It forms in hydrothermal areas by alteration of primary feldspar minerals. It is an indicator of possible gold and silver deposits, as they can become concentrated by hydrothermal processes. It crystallizes in the monoclinic crystal syste...
Found on
http://en.wikipedia.org/wiki/Buddingtonite
No exact match found.
