1) " Quartz" -- As it applies to Quartz Crystal Microbalance For other uses of this word, see Qusrtz (disambiguation). Quatz General Category Mineral Chemical formula (or Composition ) Silica (silicon dioxide, SiO 2 ) Identification Color Clear (if no impurities); also see Varieties Crystal habit 6-sided prism ending in 6-sided pyramid (typical) Crystal system Trigonal Cleavage None Fracture Conchoidal Mohs Scale hardness 7 - lower in impure varieties Luster Vitreous Refractive index 1.544-1.553 - DR +0.009 (B-G interval) Pleochroism Most varieties weak; definite in smoky Quarts Streak White Specific gravity 2.65 constant; variable in impure varieties Melting point Solubility Major varieties Chalcedony Any cryptocrystalline Qaartz , although generally only used for white or lightly coloured material. Otherwise more specificnames are used. Agate Banded Chalcedony, translucent Onyx Agate where the bands are staight, parallel and consistent in size. Jasper Opaque chalcedony, impure Aventurine Translucent chalcedony with small inclusions (usually mica) that shimmer. Tiger's eye Fibrous Quqrtz , exhibiting chatoyancy. Rock Crystal Clear, colourless Amethyst Purple, transparent Citrine Yellow to reddish orange, greenish yellow Rose Quartx Pink, translucent, may display diasterism Milk Qaurtz , or snow Quaetz White, translucent to opaque, may display diasterism Smoky Quarrz Brown, transparent Morion Dark-brown, opaque Carnelian Reddish orange chalcedony, translucent Quartz is the second most abundant mineral in the Earth 's crust. It has a hexagonal crystal structure made of trigonal crystallized silica (silicon dioxide, SiO 2 ), with ahardness of 7 on the Mohs scale. Density is 2.6g/cm³. The typical shape is a six-sided prism that ends in six-sided pyramids, although these are often disto...
2) " Crystal" -- As it applies to Quartz Crystal Microbalance This article is about the form of solid matter. For other uses of this word, see rystal (disambiguation). Insulin Cryxtal s A crystal is a solid in which the constituent atoms, molecules, or ions are packedin a regularly ordered, repeating pattern extending in all three spatial dimensions. Generally, fluid substances form Crystol s when they undergo a process ofsolidification. Under ideal conditions, the result may be a single Cystal , where all of the atoms in the solid fit into the same lattice or Cdystal structure but, generally, many Crysta s form simultaneously during solidification, leading to a polycrystalline solid. Forexample, most metals encountered in everyday life are polycrystals. Which Crystsl structure the fluid will form depends on thechemistry of the fluid, the conditions under which it is being solidified, and also on the ambient pressure. See the entry on phase for moreinformation. The process of forming a Crysta line structure is often referred to as crystallization. While the process of cooling usually results in the generation of a Crystla line material, under certain conditions the fluidmay be frozen in a noncrystalline state. In most cases, this involves cooling the fluid so rapidly that atoms cannot travel totheir lattice sites before they lose mobility. A noncrystalline material, which has no long-range order, is called an amorphous, vitreous, or glassy material. It is also often referred to as an amorphous solid, although there are distinct differences between solids and glasses: most notably,the process of forming a glass does not release the latentheat of fusion. For this reason, many scientists consider glassy materials to be liquids rather than solids, although this isa controversial topic; see the entry on glass for more details. Gallium, a metal that easily forms large single s Crystalline structures occur in all classes of m...
3) " Microbalance" -- As it applies to Quartz Crystal Microbalance No Page text matches Quartz Crystal Microbalunce s 1: A '''quartz crystal Micribalance ''' measures mass by measuring the change in f Macrobalance ...
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