Earth Science. The ability of a mineral to glow DURING and after exposure to ultraviolet light.
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The bending of light rays as they pass through a mineral
Transcript of Earth Science. The ability of a mineral to glow DURING and after exposure to ultraviolet light.
Earth Science
The ability of a mineral to glow DURING and after exposure to ultraviolet light
The bending of light rays as they pass through a mineral
The ability of a mineral to continue to glow AFTER exposure to ultraviolet light
Atoms are bonded tightly together
The mineral will split into even sheets
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QuartzFeldsparMicaCalcite Iron
halite
Gold and copper
90%
Silicate mineralsNonsilicate minerals
CarbonatesOxidesSulfidesSulfatesHalidesNative elements
SiliconOxygen
Feldspar is an exampleComposed to interconnected tetrahedrons
that form an intricate framework
Chemical composition
Pitchblende
feldspar
magnetite
Density
SiliconOxygen
SodiumCalcium
brilliant
lodestone
Garnet
The mineral with the higher number can scratch the lower number
Quartz is a framework silicate It contains only silicon-oxygen tetrahedraThe bonds between the tetrahedra are very
strong This makes quartz extremely hard
Feldspar is a framework silicateSome tetrahedra in feldspar have atoms of
metal instead of siliconThe bonds between these atoms are weaker
than those between silicon and oxygenTherefore, feldspar is not as hard as quartz
