Moganite Mineral Data

Moganite Mineral Data +

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General Moganite Information

Chemical Formula:

SiO2

Composition:

Molecular Weight = 60.08 gm

Silicon 46.74 % Si 100.00 % SiO₂

Oxygen 53.26 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

(SiO₂)

Environment:

Polymorphic relation with quartz

IMA Status:

Approved IMA 1999 (Dana # Added)

Locality:

Mogan, on southern Gran Canaria in the Canary Islands. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 67669

IMA1999-035

PDF 38-360

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Moganite Crystallography

Axial Ratios:

a:b:c =1.7961:1:2.1974

Cell Dimensions:

a = 8.758, b = 4.876, c = 10.715, beta = 90.08° V = 457.57

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/a

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

By Intensity(I/I_o): 3.335(1), 4.43(0.9), 3.391(0.58),3.117(0.13), 1.83(0.11), 1.37(0.1),

Crystal Structure:

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Heaney P J , Post J E , American Mineralogist , 86 (2001) p.1358-1366, Evidence for an I2/a to Imab phase transition in the silica, polymorph moganite at ~570 K, Sample: T = 298 K, neutron

View Additional jPOWD Structure files for Moganite
[1] [2]

Physical Properties of Moganite

Color:

Gray.

Diaphaniety:

Transparent

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Moganite

Optical Data:

Biaxial (?), b=1.526

Calculated Properties of Moganite

Fermion Index

Fermion Index = 0.02208
Boson Index = 0.97792

Photoelectric:

PE_Moganite= 1.80 barns/electron
U=PE_Moganite x r_electron= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Moganite is Not Radioactive

Moganite Classification

Dana Class:

75.1.4.2 (75)Tectosilicate Si Tetrahedral Frameworks

(75.1)SiO2 with [4] coordinated Si

(75.1.4)Dana Group

75.1.4.1 Coesite SiO2 C 2/c 2/m

75.1.4.2 Moganite ! SiO2 I2/a 2/m

Strunz Class:

IV/D.01-35 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.01 - Quartz group

IV/D.01-10 Quartz SiO2 P 3₁21,P 3₂21 3 2

IV/D.01-20 Tridymite SiO2 F1 1

IV/D.01-30 Cristobalite SiO2 P 4₁2₁2 4 2 2

IV/D.01-35 Moganite SiO2 I2/a 2/m

IV/D.01-40 Melanophlogite SiO2·n(C,H,O,S) P 4₁/nbc 4/m 2/m 2/m

IV/D.01-40* Melanophlogite-beta! SiO2·n(C,H,O,S) P m3n 4/m 3 2/m

IV/D.01-50 Coesite SiO2 C 2/c 2/m

IV/D.01-60 Stishovite SiO2 P 4/mnm 4/m 2/m 2/m

IV/D.01-70 Lechatelierite* SiO2 None

IV/D.01-80 Opal SiO2·n(H2O) None

Other Moganite Information

References:

NAME( CanMin, Vol 38) PHYS. PROP.(CanMin, Vol 38) OPTIC PROP.(CanMin, Vol 38)

See Also:

Links to other databases for Moganite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST

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Print or Cut-and-Paste your Moganite Specimen Label here :

Moganite

SiO2
Dana No: 75.1.4.2 Strunz No: IV/D.01-35
Locality:

Notes: