oxide inclusions
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Oxide minerals — ▪ Table Oxide minerals name colour lustre Mohs hardness specific gravity anatase brown to indigo blue and black; also variable adamantine to metallic adamantine 5½–6 3.8–4.0 boehmite white, when pure 3 3.0–3.1 brookite various browns metallic… … Universalium
steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying … Universalium
Brazing — This article is about the metal joining process. For the cooking technique, see braising. Brazing practice Brazing is a metal joining process whereby a filler metal is heated above and distributed between two or more close fitting parts by… … Wikipedia
Shock hardening — is a process used to strengthen metals and alloys, wherein a shock wave produces atomic scale defects in the material s crystalline structure. As in cold work, these defects interfere with the normal processes by which metallic materials yield… … Wikipedia
Polyhalite — is an evaporite mineral, a hydrated sulfate of potassium, calcium and magnesium with formula: K2Ca2Mg(SO4)4 middot;2(H2O). Polyhalite crystallizes in the triclinic system although crystals are very rare. The normal habit is massive to fibrous. It … Wikipedia
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
Corium (nuclear reactor) — LFCM redirects here. For the airport, see List of airports by ICAO code: L. The Three Mile Island reactor 2 after the meltdown. Corium, also called fuel containing material (FCM) or lava like fuel containing material (LFCM), is a lava like molten … Wikipedia
metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… … Universalium
Diamond simulant — Due to its low cost and close visual likeness to diamond, cubic zirconia has remained the most gemologically and economically important diamond simulant since 1976. The high price of gem grade diamonds, as well as significant ethical concerns of… … Wikipedia
igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary … Universalium
Glass coloring and color marking — may be obtained by 1) addition of coloring ions,[1][2] by 2) precipitation of nanometer sized colloides (so called striking glasses[1] such as ruby gold [3] or red selenium ruby ),[2] 3) by colored … Wikipedia
