1) Hexagonal mineral 2) Magnesium mineral 3) Oxide mineral
Found on
https://www.crosswordclues.com/clue/zemannite
Zemannite is a very rare oxide mineral with the chemical formula Mg0.5ZnFe3+[TeO3]3·4.5H2O. It crystallizes in the hexagonal crystal system and forms small prismatic brown crystals. Because of the rarity and small crystal size, zemannite has no applications and serves as a collector`s item. ==History and etymology== Zemannite was discovered in 1....
Found on
http://en.wikipedia.org/wiki/Zemannite
No exact match found.
