Ominelite Mineral Data (original) (raw)
General Ominelite Information
Chemical Formula:
(Fe++,Mg)Al3BSiO9
Composition:
Molecular Weight = 316.53 gm
Magnesium 0.77 % Mg 1.27 % MgO
Aluminum 25.57 % Al 48.32 % Al2O3
Iron 15.88 % Fe 20.43 % FeO
Silicon 8.87 % Si 18.98 % SiO2
Boron 3.42 % B 11.00 % B2O3
Oxygen 45.49 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Fe2+0.9Mg0.1Al3BSiO9
Environment:
Accessory mineral found in a high alumina porphyritic granite of Miocene age associated with sekaninaite (Fe cordierite). Fe 2+ -analogue of grandidierite.
IMA Status:
Approved IMA 2002 (Dana # Added)
Locality:
Omine Mountains near the misen River at Tenkawa, Yoshio, Nara Prefecture, Japan. Link to MinDat.org Location Data.
Name Origin:
Named after the locality.
Synonym:
IMA1999-025
Ominelite Image
Images:
 |
Ominelite Comments: Photomicrograph of thin-section (plain light) of zoned ominelite (omn) with quartz (qtz) and plagioclase (pl) in alkali feldspar. (AmMin 87:163). Location: Misen River in Tenkawa, Yoshino, Nara Prefecture, Japan.Scale: Grain size 0.6 mm. © American Mineralogist |
|---|
Ominelite Crystallography
Axial Ratios:
a:b:c =0.9311:1:0.5183
Cell Dimensions:
a = 10.363, b = 11.129, c = 5.769, Z = 4; V = 665.34 Den(Calc)= 3.16
Crystal System:
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
X Ray Diffraction:
By Intensity(I/Io): 5.05(1), 5.21(0.9)(200), 2.18(0.75)(150,421,312),2.79(0.75)(040), 2.97(0.75)(101), 2.9(0.5), 3.51(0.5)(130), 3.73(0.5)(121), 5.57(0.5)(020),
Crystal Structure:
Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above
| | Hiroi Y , Grew E S , Motoyoshi Y , Peacor D R , Rouse R C , Matsubara S , Yokoyama K , Miyawaki R , McGee J J , Su S-C , Hokada T , Furukawa N , Shibasaki H , American Mineralogist , 87 (2002) p.160-170, Ominelite, (Fe,Mg)Al3BSiO9 (Fe2+ analogue of grandidierite),, a new mineral from porphyritic granite in Japan | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Ominelite
Cleavage:
None
Color:
Blue.
Diaphaneity:
Transparent
Fracture:
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Habit:
Anhedral Grains - Granular minerals without the expression of crystal shapes
Habit:
Equant Grains - Granular material with equel dimensions in x, y, and z.
Hardness:
7 - Quartz
Luster:
Vitreous (Glassy)
Streak:
pale blue
Optical Properties of Ominelite
Gladstone-Dale:
CI calc= -0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2047,KC= 0.2041
Ncalc = 1.64
Optical Data:
Biaxial (-), a=1.631, b=1.654, g=1.656, bire=0.0250, 2V(Calc)=32, 2V(Meas)=31.5. Dispersion strong, r >> v.
Calculated Properties of Ominelite
Electron Density:
Bulk Density (Electron Density)=3.09 gm/cc
note: Specific Gravity of Ominelite =3.16 gm/cc.
Fermion Index:
Fermion Index = 0.01
Boson Index = 0.99
Photoelectric:
PEOminelite = 5.87 barns/electron
U=PEOminelite x rElectron Density= 18.12 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ominelite is Not Radioactive
Ominelite Classification
Dana Class:
54.01.01.02 (54)Nesosilicate Borosilicates and Some Beryllosilicates
(54.01)with (BO3)
(54.01.01)Grandidierite Group
54.01.01.01 Grandidierite (Mg,Fe)Al3(BO4)(SiO4)O Pbnm 2/m 2/m 2/m
54.01.01.02 Ominelite! (Fe,Mg)Al3BSiO9 Pbnm 2/m 2/m 2/m
Strunz Class:
09.AJ.05 09 - SILICATES (Germanates)
09.A - Nesosilicates
09.AJ -Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra,
09.AJ.05 Grandidierite (Mg,Fe)Al3(BO4)(SiO4)O Pbnm 2/m 2/m 2/m
09.AJ.05 Ominelite! (Fe,Mg)Al3BSiO9 Pbnm 2/m 2/m 2/m
Other Ominelite Information
References:
NAME( AmMin, Vol 87, p 160) PHYS. PROP.(AmMin, Vol 87, p 160) OPTIC PROP.(AmMin, Vol 87, p 160)
See Also:
Links to other databases for Ominelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
Search for Ominelite using:
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]
Visit our Advertisers for Ominelite :
A Bijoux Google Search for Ominelite
Adam's Minerals Google Search for Ominelite
Cape Minerals Google Search for Ominelite
Dakota Matrix Minerals Google Search for Ominelite
Excalibur Mineral Corp. Google Search for Ominelite
Exceptional Minerals Google Search for Ominelite
John Betts Fine Minerals Search for Ominelite
McDougall Minerals Google Search for Ominelite
Mineral News Website Link
Rock and Mineral Shows Google Search for Ominelite
Weinrich Minerals, Inc. Google Search for Ominelite
Ask about Ominelite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol
Print or Cut-and-Paste your Ominelite Specimen Label here :
Ominelite
(Fe++,Mg)Al3BSiO9
Dana No: 54.01.01.02 Strunz No: 09.AJ.05
Locality:
Notes: