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.

Name Pronunciation:

Moganite

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.

Diaphaneity:

Transparent

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Moganite

Optical Data:

Biaxial (?), b=1.526

Calculated Properties of Moganite

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Moganite= 1.80 barns/electron
U=PE_Moganite x rElectron Density= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Moganite is Not Radioactive

Moganite Classification

Dana Class:

75.01.04.02 (75)Tectosilicate Si Tetrahedral Frameworks

(75.01)SiO2 with [4] coordinated Si

(75.01.04)Dana Group

75.01.04.01 Coesite SiO2 C 2/c 2/m

75.01.04.02 Moganite! SiO2 I2/a 2/m

Strunz Class:

04.DA.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DA -With small cations

04.DA.20 Lutecite* SiO2 I12/a1=C 2/c 2/m

04.DA.20 Moganite! SiO2 I2/a 2/m

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 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info
12 - WWW-MINCRYST

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

Moganite

SiO2
Dana No: 75.01.04.02 Strunz No: 04.DA.20
Locality:

Notes: