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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 ?
Tenders are invited for Stopper-monoblock of corundum graphite composition with periclase head part or analog
The following compounds were used as calibration standards: albite (Na), periclase (Mg), wollastonite (Si and Ca), orthoclase (K), and synthetic [Al.
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.
3 October 2011 - Austrian refractory material producer RHI AG (WBAG:RHI) said it had taken over Irish raw materials producer Premier Periclase for EUR21m (USD28m).
Two varieties of Magnesium oxide manufactured by Dead Sea Periclase were purchased from Signet, Mumbai.
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.
Studies on sintering of some natural magnesites and crystal growth of periclase al high temperature".