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 (pĕr′ĭ-klās′, -klāz′)
A mineral form of magnesium oxide, MgO, usually occurring in cubic crystals or grains.

[German Periklas : Greek peri-, intensive pref.; see peri- + Greek klasis, breaking (from its perfect cleavage); see orthoclase.]


(Minerals) a mineral consisting of magnesium oxide in the form of isometric crystals or grains: occurs in metamorphosed limestone
[C19: from New Latin periclasia, from Greek peri very + klasis a breaking, referring to its perfect cleavage]
periclastic adj
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.periclase - a white solid mineral that occurs naturally as periclasepericlase - a white solid mineral that occurs naturally as periclase; a source of magnesium
atomic number 12, magnesium, Mg - a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine)
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
References in periodicals archive ?
In OSA, more than 40 different mineral phases were identified by X-ray analyses with the major phases being anhydrite, quartz, periclase, calcite, and wollastonite [1].
Albemarle - California Metal - Dandong Divine Flame Retardant Materials Technology Co, Ltd - Dow Chrmieal - Grecian Magnesite - Haicheng Jinghua Mineral Products Co, Ltd - Hubei Xiangyun - Konoshima Chemical Co, Ltd - Manistee - Martin Marietta Magnesia Specialties Llc - Naikai Salt Industries - Nedmag - Nihon Kaisui Kalco Co, Ltd - Premier Magnesia - Premier Magnesia, Llc - Premier Periclase Ltd - Qinghai Best Magensium - Qinghai Salt Lake Industry Co, Ltd - Rohm And Haas Co - Shandong Luhua Chemical Co, Ltd - Shanghai Siic Zhentai Chemical Co, Ltd - Sirius Minerals - Ube Material Industries Ltd - Weifang Hellon - Weifang Yuandong Rubber&Plastic Technology Co, Ltd - Western Mininf Group - Yingkou Global Powder Engineering Co, Ltd
Hot bending strength and creep behaviour at 1000-1400[degrees][degrees] C of high alumina refractory castables with spinel, periclase and dolomite additions, Journal of the European Ceramic Society 29: 53-58.
Magnesium oxide or magnesia occurs naturally as periclase is highly mobile in the form of [Mg.
Dead Sea MFR, a joint venture with Dead Sea Periclase, produces a number of grades of magnesium hydroxide materials.
02 furnace in the periclase crucible, whereby impurities in oxide form, which are present in initial feedstock, interact with the crucible material--periclase, forming complex oxide compounds on basis of MgO-spinel that are in solid-liquid state at values of the process temperature up to 2000 [degrees]C.
2]), the lower the temperature required for brucite and periclase to be stable.
3 million off the assets of its Ireland-based refractory brick-making business Premier Periclase as it fell into losses and has been temporarily closed.
For years, locals living near the Premier Periclase plant just outside Drogheda have awoken to find a light dusting of a snow-like substance on trees and cars - even in summer.
Through an arrangement with the Dead Sea Bromine Group and Dead Sea Periclase, AmeriHaas will offer commercial quantities of several grades of magnesium hydroxide (FR-20), which allows production of nonhalogen, low-smoke, flame-retarded thermoplastics without high filler loadings.