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milky quartz crystals Crystaline Glass?
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If it is rigid and you can see through it, it is glassy. Definition given above is overly broad. Counter-example: quartz crystal (or any macroscale monocrystalline transparent material, gem quality diamond, monocrystalling ice, or carefully grown rock candy [sucrose crystals] &c) However, you have an interesting thought started, can you refine the definition to exclude these counter-examples?
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The administrator has disabled public write access. |
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milky quartz crystals Crystaline Glass?
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If it is rigid and you can see through it, it is glassy. Definition given above is overly broad. Counter-example: quartz crystal (or any macroscale monocrystalline transparent material, gem quality diamond, monocrystalling ice, or carefully grown rock candy [sucrose crystals] &c) However, you have an interesting thought started, can you refine the definition to exclude these counter-examples?
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The administrator has disabled public write access. |
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milky quartz crystals Crystaline Glass?
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How about this: if you heat it and it melts at a definite temperature (or starts to phase separate) then it is a crystal. If it gets soft and gooey then it is a glass. Dr. Bob
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The administrator has disabled public write access. |
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milky quartz crystals Crystaline Glass?
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If it is rigid and you can see through it, it is glassy. Definition given above is overly broad. Counter-example: quartz crystal (or any macroscale monocrystalline transparent material, gem quality diamond, monocrystalling ice, or carefully grown rock candy [sucrose crystals] &c) However, you have an interesting thought started, can you refine the definition to exclude these counter-examples? I was providing a rule of thumb for _polymers_, not giving a definition. Consider it the next time you examine a plastic sode-pop bottle, which is (mostly) glassy polyethylene terephthalate. Note that at the bottom of the bottle, were it is thickest, the plastic becomes milky, indicating crystallization. My definition of a _solid_ is any material that has an equilibrium shear modulus. A glass is a non-crystalline solid. Regards, Peter Mott
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The administrator has disabled public write access. |
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milky quartz crystals Crystaline Glass?
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I was providing a rule of thumb for _polymers_, not giving a definition. I saw that, I was just hoping you had a more general insight (not to diminish the one you did provide, it was a very good insight)
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Favoured: 0
It is the cornerstone of the outstanding protective properties. It is believed that stripped all evil. The motto of this stone is that it reflects all that negative, and reinforces what is positive. His calming influence and vibration soothes the stone to the owner. To achieve the effect of reassuring and strengthening, this stone should be put on the chest at the height of the heart. 
