Naturally occurring Solid Inorganic Crystalline form Definite chemical composition.

Transcript of Naturally occurring Solid Inorganic Crystalline form Definite chemical composition.

Naturally occurringSolidInorganicCrystalline formDefinite chemical composition

LusterHardnessStreakColorCrystal Cleavage/FractureOther

http://upload.wikimedia.org/wikipedia/commons/8/86/GalenaKansas.jpg

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Field Test•Try to scratch with Fingernail - if so, 2.5

if not, •Try to scratch with Copper Penny – if so, 3

if not, •Try to scratch withSteel Nail – if so, 5

if not, •Try to scratch withGlass Plate – if so, 5.5

if not,•Try to scratch with Streak Plate – if so, 7.5 if not, > 7.5

Scratch a mineral with either another mineral or field test materials. The harder mineral will leave a mark or cut into the softer mineral.

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Rub the mineral across the porcelain plate. The color left behind is the streak. Nonmetallic minerals and those that have a hardness greater than the streak plate will leave either white or no streak.

Fracture

Back

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http://images.google.com/imgres?imgurl=http://geology.rockbandit.net/wp-content/uploads/2008/09/staurolite.jpg&imgrefurl=http://geology.rockbandit.net/2008/09/09/50-minerals-for-fun-and-profit/&usg=__2TC3Xh3yJnSz3xp-rkgbdsG4-N8=&h=250&w=250&sz=16&hl=en&start=47&um=1&tbnid=YM20WuQ3A1oy-M:&tbnh=111&tbnw=111&prev=/images%3Fq%3Dstaurolite%26ndsp%3D20%26hl%3Den%26rls%3Dcom.microsoft:*%26rlz%3D1I7GZEZ_en%26sa%3DN%26start%3D40%26um%3D1

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Crystal (galena) (pyrite) (fluorite) (quartz) Twinning(staurolite)

Fluorescense (fluorite)HCl Acid Reaction (calcite)Heft (galena)Magnetism (magnetite)Plasticity (mica)Smell (sulfur)Sound: actually a reaction to heat expansion

(sulfur)Taste (halite)Touch (talc) (graphite) (kaolonite)

http://www.free-pictures-photos.com/minerals/mineral-07.jpg

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Naturally occurring Solid Inorganic Crystalline form Definite chemical composition.

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Transcript of Naturally occurring Solid Inorganic Crystalline form Definite chemical composition.

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