Periclase Mineral Data

Periclase Mineral Data +

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General Periclase Information

Chemical Formula:

MgO

Composition:

Molecular Weight = 40.30 gm

Magnesium 60.30 % Mg 100.00 % MgO

Oxygen 39.70 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

MgO

Environment:

Contact metamorphism of dolomites and magnesites.

IMA Status:

Valid Species (Pre-IMA) 1840

Locality:

Monte Somma and Predazzo, Italy. Link to MinDat.org Location Data.

Name Origin:

From the Greek peri - "around" and klao - "to cut."

Synonym:

ICSD 9863

PDF 43-1022

Periclase Image

Images:

Periclase

Comments: Green nickel-rich periclase on matrix.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Periclase Srebrodolskite

Comments: Black grains of srebrodolskite with white periclase.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Periclase Crystallography

Cell Dimensions:

a = 4.203, Z = 4; V = 74.25 Den(Calc)= 3.61

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.106(1), 1.489(0.52), 1.216(0.12),

Crystal Structure:

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Hazen R M , American Mineralogist , 61 (1976) p.266-271, Effects of temperature and pressure on the cell dimension and X-ray temperature, factors of periclase, T = 24 C, P = 1 atm, standard mount

View Additional jPOWD Structure files for Periclase
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Physical Properties of Periclase

Cleavage:

[001] Perfect, [010] Perfect, [100] Perfect

Color:

Brownish yellow, Colorless, Green, Gray white, Yellow.

Density:

3.67 - 3.9, Average = 3.78

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

6 - Orthoclase

Luminescence:

Fluorescent, Long UV=light yellow.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Periclase

Gladstone-Dale:

CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.205,KPDmeas= 0.1955,KC= 0.2

Optical Data:

Isotropic, n=1.74.

Calculated Properties of Periclase

Electron Density:

r_electron=3.76 gm/cc
note: r_Periclase=3.79 gm/cc.

Fermion Index

Fermion Index = 0.06049
Boson Index = 0.93951

Photoelectric:

PE_Periclase= 1.33 barns/electron
U=PE_Periclase x r_electron= 4.99 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Periclase is Not Radioactive

Periclase Classification

Dana Class:

4.2.1.1 (4)Simple Oxides

(4.2)with a cation charge of 2+ (A++ O)

(4.2.1)Periclase group (Isometric, Fm3m)

4.2.1.1 Periclase MgO F m3m 4/m 3 2/m

4.2.1.2 Bunsenite NiO F m3m 4/m 3 2/m

4.2.1.3 Manganosite MnO F m3m 4/m 3 2/m

4.2.1.4 Monteponite CdO F m3m 4/m 3 2/m

4.2.1.5 Lime CaO F m3m 4/m 3 2/m

4.2.1.6 Wustite FeO F m3m 4/m 3 2/m

4.2.1.7 Hongquiite* TiO F m3m 4/m 3 2/m

Strunz Class:

IV/A.04-10 IV - Oxides

IV/A - Oxides with metal : oxygen = 1:1 and 2:1 (M2O,MO)

IV/A.04 - Periclase Group, Periclase - Murdochite series

IV/A.04-10 Periclase MgO F m3m 4/m 3 2/m

IV/A.04-20 Wustite FeO F m3m 4/m 3 2/m

IV/A.04-30 Bunsenite NiO F m3m 4/m 3 2/m

IV/A.04-40 Manganosite MnO F m3m 4/m 3 2/m

IV/A.04-50 Monteponite CdO F m3m 4/m 3 2/m

IV/A.04-60 Lime CaO F m3m 4/m 3 2/m

IV/A.04-70 Murdochite PbCu6O8-x(Cl,Br)2x F m3m 4/m 3 2/m

Other Periclase Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Periclase

MgO
Dana No: 4.2.1.1 Strunz No: IV/A.04-10
Locality:

Notes: