1) Monoclinic mineral 2) Zinc mineral
Found on
https://www.crosswordclues.com/clue/köttigite
Köttigite is a rare hydrated zinc arsenate which was discovered in 1849 and named by James Dwight Dana in 1850 in honour of Otto Friedrich Köttig (1824 - 1892), a German chemist from Schneeberg, Saxony, who made the first chemical analysis of the mineral. It has the formula Zn3(AsO4)2.8H2O and it is a dimorph of metaköttigite, which means that ...
Found on
http://en.wikipedia.org/wiki/Köttigite
No exact match found.
