1 What optical phenomena is shown here? .
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Transcript of 1 What optical phenomena is shown here? .
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What optical phenomena is shown here?
http://en.wikipedia.org/wiki/Iridescence
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Chem270 Geology and the Engineer
Professor Howard L. McLeanDepartment of ChemistryRose-Hulman Institute of
TechnologySpring 2007
Day 03 Mineral Properties for Identification H SG S L notes (Table 4.9)
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Important Non-silicate Minerals (sulfides)
Mineral H SG Color Streak Luster notes
FeS2 pyrite 6.5 5.1 brass yellow
black metallic
strikes fire with steel, cc
ChalcopyriteCuFeS2
3.5 4.2 brass yellow
black metallic
iridescent
CuS covellite
1.5 4.7 dark blue grey- black
metallic
purplish tarnish
galena PbS 2.5 7.5 lead grey grey Metallic (dull)
cubic cleavage
Bornite Cu5FeS4
3 5.1 Brown grey metallic
iridescent
Sphalerite ZnS
3.5 4 Dark brown
Brown resinous
translucent
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Important Non-silicate Minerals (sulfides)
Hamblin; Howard, Exercises in Physical Geology
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Important Non-silicate Minerals (sulfides)
Hamblin; Howard, Exercises in Physical Geology
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Important Non-silicate Minerals (native elements)
Mineral H SG Color Streak Luster notes
Cu copper 2.5 8.9 red red metallic
malleable
Ag silver 2.5 10.5
grey white white metallic
malleable
Au gold 2.5 19.3
yellow yellow metallic
malleable
Sb antimony
3.5 6.7 grey white grey metallic
sectile
C diamond 10 3.5 variable -- greasy sparkles
C graphite 1 2.2 black black metallic
marks paper
S sulfur 2 2.1 yellow white yellow
resinous
odor upon burning
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Important Non-silicate Minerals (native elements)
Hamblin; Howard, Exercises in Physical Geology
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Important Non-silicate Minerals (oxides)
Mineral H SG C S L notes
Cu2O cuprite
3.5 6.1 red red metallic
dissolves, HCl
Al2O3 corundum
9 4 brown-blue
vitreous
very hard!
Fe2O3 hematite
6 5.3 brown-black
red metallic
magnetic when heated
Fe3O4 magnetite
6 5.2 black black metallic
magnetic
FeCr2O4 chromite
5.5 4.6 black brown metallic
no cleavage
Al2O3 . 2H2O
bauxite
2 2.1 red-brown brown dull earthy concretionary
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Important Non-silicate Minerals (oxides)
Hamblin; Howard, Exercises in Physical Geology
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Important Non-silicate Minerals (oxides)
Hamblin; Howard, Exercises in Physical Geology
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Important Non-silicate Minerals (oxides)
Mineral H SG Color Streak Luster notes
SnO2 cassiterite
6.5 7 Brown-black
White-brown
Vitreous
Translucent
FeTiO3 ilmenite
5.5 4.7 Black Black Metallic
Nonmagnetic
FeO(OH) goethite
5 4.4 Brown Brown Dull Crystalline
Fe2O3 . 3H2O limonite
5 3.8 Brown Yellow-brown
Dull Earthy
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Important Non-silicate Minerals (oxides)
Hamblin; Howard, Exercises in Physical Geology
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Important Non-silicate Minerals (halide salts)
Mineral H SG Color Streak Luster notes
NaCl halite 2.5 2.2 variable white vitreous
water soluble
KCl sylvite 2.2 variable white vitreous
water soluble
CaF2 fluorite
4 3.2 variable white vitreous
translucent
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Important Non-silicate Minerals (halide salts)
Hamblin; Howard, Exercises in Physical Geology
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Important Non-silicate Minerals (phosphates)
Mineral H SG Color Streak Luster notes
triphyllite water soluble
Ca3(PO4)2 apatite
Ca5(PO4)3(F,Cl,OH)
5 3.2 green variable
white vitreous
sub-resinoous
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Important Non-silicate Minerals (carbonates)
Mineral H SG Color Streak Luster notes
CaCO3 calcite 3 2.7 variable
white vitreous
soluble in HCl
CaCO3
aragonite
3.5 2.9 colorless
white vitreous
stained with MnSO4
(Mg,Ca)2(CO3)2 dolomite
3.5 2.9 white-brown
white vitreous
Fresh powder soluble in HCl
Cu3(OH)2CO3 malachite
3.5 4 bright green
green silky-dull
Cu2(OH)2(CO3)2 azurite
3.5 3.8 dark blue
blue vitreous
FeCO3
siderite
3.5 3.9 brown white vitreous
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Important Non-silicate Minerals (carbonates)
Hamblin; Howard, Exercises in Physical Geology
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Important Non-silicate Minerals (carbonates)
Mineral H SG Color Streak Luster notes
BaCO3 witherite 3.5 4.3 white-grey
white resinous
rough striations
PbCO3 cerussite 3 6.6 white-grey
white vitreous
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Important Non-silicate Minerals (sulfates)
Mineral H SG Color Streak Luster notes
BaSO4 barytes 3 4.5 white-grey
white vitreous
tubular crystals
SrSO4 celestine 3.5 4 white-blue
white vitreous
very brittle
PbSO4 anglesite 3 6.3 white-blue
white vitreous
associated with galena
CaSO4
anhydrite3 3 White-
brownwhite pearly splintery
fracture
CaSO4 . 2H2O
gypsum
2 2.3 colorless
white vitreous
flexible, inelastic
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Important Non-silicate Minerals (sulfates)
Hamblin; Howard, Exercises in Physical Geology