1) Iron mineral 2) Sodium mineral 3) Titanium mineral 4) Triclinic mineral
Found on
https://www.crosswordclues.com/clue/zircophyllite
Zircophyllite is a complex mineral, formula (K,Na)3(Mn,Fe)7(Zr,Ti,Nb)2Si8O24(OH,F)7. It crystallizes in the triclinic - pinacoidal crystal class as dark brown to black micaceous plates. It has perfect 001 cleavage, a Mohs hardness of 4 to 4.5 and a specific gravity of 3.34. Its indices of refraction are nα=1.708 nβ=1.738 nγ=1.747 and it has a 2...
Found on
http://en.wikipedia.org/wiki/Zircophyllite
No exact match found.
