University:
Felician University
Course:
CHEM-001 | Basic Chemistry
Academic year:

2020
Views:

95

Pages:

1
Author:

larbiwxcvbn

Name Formula Luster/Color Chalcopyrite CuFeS2 Metallic: Brassy to golden yellow Copper Cu Streak Greenishblack Metallic (non): Copper red Copper red Galena PbS Metallic: Lead gray Gray to black Gold Au Metallic: Pale to golden yellow Yellow Graphite C Black to gray Hematite Fe2O3 Metallic: silver to gray Greasy feel Metallic: rusted to sparkles Black to reddish brown Metallic: Black Magnetite Nickel Fe3O4 Ni Metallic: lustrous silvery-white Red to reddish brown METALLIC MINERALS CHART Hard Breakage 3.5 4.0 3.0 3.5 2.5 2.5 3.0 1.0 2.0 5.0 6.0 Black 5.0 Black 6.0 5.0 Pyrite FeS2 Metallic: Light brassy yellow Greenishblack Silver Ag Light gray to silver Sphalerite ZnS Metallic: Silvery white tarnishes to black Metallic: yellow to yellow brown White, yellow, or brown Mineral Structure Uneven fracture Mineral Group Sulfide Tetragonal Hackly fracture Native Element Perfect cube cleavage Specific Gravity Uses & Special properties 4.1 4.3 Main ore of copper: often confused with gold Cubic (rare) 8.5 8.9 Used in coins, pipes, wire, cooking utensils, jewelry; Malleable & Ductile Sulfide Cubic 7.4 7.6 Hackly fracture Native Element Cubic (rare) 15.0 19.3 Source of lead used in pipes, & batteries. Shield for x-rays, fishing equipment, sports HIGH in HEFT (weight) Used in jewelry, coins, dental fillings, medicines, does not tarnish Basal cleavage (scales) (pure form) Irregular fracture Native Element Hexagonal 2.1-2.2 Oxide Hexagonal 5.26 Used in dry lubricants & pencil “lead” rods to control some small nuclear reactions. Greasy, Oily, feeling Source of iron used in making steel “pig iron” (red ocher) RED STREAK Can be Specularite (like gliter) Conchoidal fracture Oxide Cubic (partly octahedral) 5.18 Source of iron magnetic called “lodestone” magnetic attraction Native Element Cubic 5.18 An economically important source of nickel is the iron ore limonite 6.0 6.0 Conchoidal fracture Uneven fracture Sulfide Cubic 4.8-5.0 6.5 2.5 Hackly fracture Native Element Cubic (rare) 10 12 Perfect dodecahedral cleavage Sulfide Dodecahedral 3.9 4.1 3.5 4.0 Known as “fool’s gold” Source of Iron; & sulfur Alters to Limonite Used in coins, dental fillings, silver plate, jewelry, usually found in wire like or branching forms malleable & ductile; Tarnishes to black Important zinc ore; known as “ruby zinc”