GEOL 2540 Lecture Notes - Lecture 24: Zinc Sulfide, Chalcopyrite, Realgar

• School: University of Manitoba
• Department: Geological Sciences
• Course: GEOL 2540
• Professor: Chakhmouradian Anton

Document Summary

B als r e min d e t ela r d n a s e ulfid. 0. 05-0. 08 ppm f i n d m o r e r e f i n d m o r e r e. Depending on how vacancies are distributed in the structure, may be hexagonal (nonmagnetic) or monoclinic (magnetic) f i n d m o r e r e f i n d m o r e r e. Sphalerite isom /tetrahedra isom. /tetrahedra perfect cleavage on {110} H ~3. 5-4 hexagonal/platy orthorhombic/prismatic to acicular perfect cleavage on {0001} H ~2 fusible f i n d m o r e r e. Sbs f i n d m o r e r e. Luster pyrite, pyrrhotite, marcasite, pentlandite, gold, etc. (sub)metallic? pyrrhotite, chalcopyrite, pentlandite, etc. soft? (>3 but < 5) (>3, but < 5) Morphology hard? (>5) (>5) pyrite, marcasite, etc. marcasite not observed? d? t b.