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

2023
Views:

71

Pages:

1
Author:

Clint W.

ш HARD_uSTER NESS 1-2 � � � � .<:: ffi 2.5 _, Properties of Common Minerals а: <( ш � а: COMMON COLORS DISТINGUISHING CHARACTERISТICS USE{S) V silverto gray Ыасk streak, greasy feel pencil lead, lubricants с Graphite V metallic silver gray-Ыack streak, cublc cleavage, density = 7.6 g/cm3 ore of lead, batteries PbS Galena (.) u.. COMPOSIТION* MINERAL NAME 5.5-6.5 V Ыасk to silver Ыасk streak, magnetic ore of iron, steel Fe3o4 Magnetite 6.5 V brassy yellow green-Ыack streak, (fool's gold) ore of sulfur FeS2 Pyrite 5.5 -6.5 or 1 V metallic silver or earthy red red-brown streak ore of iron, jewelry Fe2o3 Hematite white to green greasy feel ceramics, paper Mg3Si4O1o(OH)z Talc yellow to amber white-yellow streak sulfuric acid s Sulfur 1 V 2 V 2 V white to pink or gray easily scratched Ьу fingernail plaster of paris, drywall CaSO4•2HzO Selenite gypsum 2-2.5 V colorless to yellow flexiЫe in thin sheets paint, roofing KAl3Si3O1o(OH)2 Muscovite mica 2.5 V colorless to white сuЫс cleavage, salty taste food additive, melts ice NaCI Halite 2.5-3 v' Ыасk to dark brown flexiЫe in thin sheets construction materials K(Mg,Fe)3 AISi3O1o(OH)2 Biotite mica 3 V colorless or variaЬle bubЬles with acid, rhombohedral cleavage cement, lime СаСОз Calcite � � 3.5 V colorless or variaЫe bubЫes with acid when powdered building stones CaMg(CO3)2 Dolomite Е 4 V colorless or variaЫe cleaves in 4 directions hydrofluoric acid CaF2 Fluorite 5-6 V Ыасk to dark green cleaves in 2 directions at 90 ° mineral collections, jewelry (Ca,Na) (Mg,Fe,AI) (Si,Al)zO5 Pyroxene (commonly augite) 5.5 V Ыасk to dark green cleaves at 56 ° and 124 ° 6 V white to pink cleaves in 2 directions at 90 ° ceramics, glass КAISi3O8 Potassium feldspar (commonly orthoclase) 6 V white to gray cleaves in 2 directions, striations visiЫe ceramics, glass (Na,Ca)AISi3Os Plagioclase feldspar '---- / :m mineral collections, CaNa(Mg,Fe)4 (Al,Fe,Тi)з jewelry Si5O22(O,OH)2 Amphibole (commonly hornЬlende) 6.5 V green to gray or brown commonly light green and granular furnace bricks, jewelry (Fe,Mg)2SI04 Olivine 7 V colorless or variaЫe glassy luster, may form hexagonal crystals glass, jewelry, electronics SiOz Quartz 6.5-7.5 v' dark red to green oflen seen as red glassy grains in NYS metamorphic rocks jewelry (NYS gem), abrasives Fe3AlzSi3O12 Garnet *Chemical symbols: AI = aluminum С= carbon Са= calcium v' = dominant form of breakage CI = chlorine F = fluorine Fe = iron Н = hydrogen К = potassium Mg = magnesium Na = sodium О= oxygen РЬ = lead S = sulfur Si = silicon Тi = titanium