The low energy vibrational excitations of perfect crystals seen in specific heat and thermal conductivity measurements can be described in terms of Debye phonons. In amorphous solids, however, the specific heat is dominated by another kind of excitations, which also couple to the phonons and thus ...
Opals are not actually crystals,but amorphous solids. This means their atoms are not arranged in a regular, repeating pattern, unlike true crystals like diamonds or sapphires. Gemstone Treatments and Enhancements Many gemstones undergo treatments and enhancementsto improve their color, clarity, or dura...
oramorphoussolids, and their rigidity falls with increasing temperature—i.e., they do not have fixedmeltingpoints; some may, however, form true liquids. With these large molecules, thegaseousstate is not attainable, because they decompose chemically before thetemperatureis high enough for the ...
Oxygen bars were a fad for a while, I think it's kind of over now, but you can still buy cans of concentrated oxygen (they say they are about 80%, compared to the 21% natural concentration in air) meant to be inhaled for non-medical reasons. In a proper oxygen bar you sit arou...
The components of a solid can only be arranged in two (2) different ways: (1) in a way where they form regular repeating three dimensional structures called a crystal lattice which produces crystals and (2) in no particular order or arrangement which produces an amorphous solid. Crystals gene...
Unlike Crystalline, the particles of amorphous solids do not have a pattern. They do not have a definite melting point but melt slowly at different ranges of temperatures. When melted, amorphous solids will turn into a soft and malleable state until it becomes liquid. Plastic, gel, and glass...
Structure Crystalline solids (except mercury) Can be crystalline or amorphous Luster Shiny and lustrous Some are shiny and some are dull Hardness Malleable and ductile Brittle The metals in groups 1A 2A and 3A are labelled as the following: Group 1A metals are alkali metals. They have only ...
of the container so it shows one kind of surface on the top and quite a different kind where it was resting on other semi-molten blobs underneath. Contrast the relatively dull broken crystal surfaces of this 99.5% pure lump with the much shinier, crisper crystals of the 99.99+% lump above...
Carbon (C) is a non-metallic element found abundantly on Earth in all three of its forms. The physical characteristics of carbon are widely different in each of its several allotropic forms, the best known of which are amorphous, graphite, and diamond. T
refers to processes in which a substance penetrates into the actual interior ofcrystals, of blocks ofamorphous solids, or of liquids. Sometimes the wordsorptionis used to indicate the process of the taking up of agasorliquidby a solid without specifying whether the process is adsorption or absorp...