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periclase

方镁石

WordNet (r) 3.0 (2006) (WordNet)

periclase
n 1: a white solid mineral that occurs naturally as periclase; a
source of magnesium [synonym: {periclase}, {magnesia},
{magnesium oxide}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Periclase \Per"i*clase\, Periclasite \Per`i*cla"site\, n. [Pref.
peri- Gr. ? to break.] (Min.)
A grayish or dark green mineral, consisting essentially of
magnesia (magnesium oxide), occurring in granular forms or in
isometric crystals.
[1913 Webster]

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Periclase MgO - Handbook of Mineralogy
Periclase MgO c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Cubic Point Group: 4 m 3 2 m As small octahedra, less commonly cubo-octahedra or dodecahedra, may be clustered; granular, massive Physical Properties: Cleavage: {001}, perfect; on {111}, good; may exhibit parting on {011}
Lecture Notes - Mineralogy - Periclase Structure
• Knowing the value of Z, it is possible to determine the exact locations of the Mg and O atoms using the special positions for the periclase space group Fm3m With the multiplicity of a general position equal to 192, it is clear that Mg and O must be on special positions indeed
Elasticity of single-crystal periclase at high pressure and . . .
Our experimental results were used to evaluate the combined effects of pressure and temperature on the elastic moduli of single-crystal periclase using third-order Eulerian finite-strain equations
Periclase deforms more slowly than bridgmanite under mantle . . .
In this work we use 2 5-dimensional dislocation dynamics to model the low-stress creep of MgO periclase at lower mantle pressures and temperatures We show that periclase deforms very slowly
4D Write Pro New Document - Magnesia Specialties
Never give anything by mouth to an unconscious person If you feel unwell, seek medical advice (show the label where possible) If inhaled and if breathing is difficult, remove victim to fresh air and keep at rest in a comfortable position for breathing Not expected to be an irritant
Robert Hazen
Title
Periclase from Kuhilal Deposit, Southwestern Pamirs as a . . .
The presented study pro- vides data on the geological position of periclase-bearing rocks, paragenesis of periclase, diagnostics of the mineral, chemical composition and trace elements, as well as possible conditions for its formation

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