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Ominelite

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View of Mount Ōmine, Ōmine Mts, Nara Prefecture, Japan
Formula:
(Fe2+,Mg)(Al,Fe3+)3(SiO4)(BO3)O2
Colour:
Blue
Lustre:
Vitreous
Hardness:
7
Specific Gravity:
3.2 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in 2002 by Yoshikuni Hiroi et al. for the Omine Mountain(s), Japan, the type locality.
Fe analogue of Grandidierite.



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Classification of OmineliteHide

Approved
Approval Year:
1999
First Published:
2002
9.AJ.05

9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4

Physical Properties of OmineliteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Blue
Streak:
Pale blue
Hardness:
Hardness Data:
Estimated
Tenacity:
Brittle
Cleavage:
None Observed
Density:
3.2 g/cm3 (Calculated)

Optical Data of OmineliteHide

Type:
Biaxial (-)
RI values:
nα = 1.631 nβ = 1.654 nγ = 1.656
2V:
Measured: 31° , Calculated: 32°
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
strong

Chemical Properties of OmineliteHide

Formula:
(Fe2+,Mg)(Al,Fe3+)3(SiO4)(BO3)O2
IMA Formula:
Fe2+Al3O2(BO3)(SiO4)

Crystallography of OmineliteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 10.343 Å, b = 11.095 Å, c = 5.7601 Å
Ratio:
a:b:c = 0.932 : 1 : 0.519
Unit Cell V:
661.00 ų (Calculated from Unit Cell)
Z:
4
Morphology:
No forms mentioned.
Twinning:
None mentioned.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.21 (vs)
5.05 (vvs)
2.97 (s)
2.79 (s)
2.18 (s)

Type Occurrence of OmineliteHide

Geological Setting of Type Material:
In a porphyritic granite and granodiorite.
Associated Minerals at Type Locality:
Reference:
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. (2002) Ominelite, (Fe,Mg)Al3BSiO9 (Fe2+ analogue of grandidierite), a new mineral from porphyritic granite in Japan. American Mineralogist: 87: 160–170.

Synonyms of OmineliteHide

Other Language Names for OmineliteHide

German:Ominelit
Spanish:Ominelita

Related Minerals - Nickel-Strunz GroupingHide

9.AJ.Hingganite-(Nd)(Nd,Y,Ce,Sm)2(◻,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
9.AJ.05Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm (2/m 2/m 2/m)
9.AJ.10Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3Orth. mmm (2/m 2/m 2/m)
9.AJ.10Holtite(Ta0.60.4)Al6BSi3O18(O,OH)2.25Orth. mmm (2/m 2/m 2/m) : Pnma
9.AJ.10Magnesiodumortierite(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3Orth.
9.AJ.15GarrelsiteBa3NaSi2B7O16(OH)4Mon.
9.AJ.20BakeriteCa4(H5B5Si3O20)Mon. 2/m : P21/b
9.AJ.20DatoliteCaB(SiO4)(OH)Mon. 2/m : P21/b
9.AJ.20Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10Mon. 2/m
9.AJ.20Gadolinite-(Y)Y2Fe2+Be2Si2O10Mon. 2/m : P21/b
9.AJ.20Hingganite-(Ce)(Ce,REE)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
9.AJ.20Hingganite-(Y)(Y,REE,Ca)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
9.AJ.20Hingganite-(Yb)(Yb,Y,REE)2□Be2[SiO4]2(OH)2
9.AJ.20HomiliteCa2(Fe2+,Mg)B2Si2O10Mon. 2/m : P21/b
9.AJ.20Melanocerite-(Ce)(Ce,Ca)5(SiO4,BO4)3(OH,0)Hex.
9.AJ.20Minasgeraisite-(Y)BiCa(Y,Ln)2(□,Mn)2(Be,B,Si)4Si4O16 [(OH),O]4Tric. 1 : P1
9.AJ.20Calcybeborosilite-(Y)(Y,Ca)2(□,Fe2+)(B,Be)2[SiO4]2(OH,O)2Mon.
9.AJ.25Stillwellite-(Ce)(Ce,La,Ca)BSiO5
9.AJ.30Cappelenite-(Y)Ba(Y,Ce)6Si3B6O24F2Trig. 3 : P3
9.AJ.35Okanoganite-(Y)(Na,Ca)3(Y,Ce)12Si6B2O27F14
9.AJ.35Vicanite-(Ce)(Ca,Ce,La,Th)15As5+(As3+0.5,Na0.5)Fe3+Si6B4O40F7Trig.
9.AJ.35Hundholmenite-(Y)(Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1-x)(Si,As5+)Si6B3(O,F)48Trig. 3m : R3m
9.AJ.35Proshchenkoite-(Y)Ca(Y,REE,Ca,Na,Mn)15Fe2+(P,Si)Si6B3O34F14Trig. 3m : R3m
9.AJ.40JadariteLiNaSiB3O7(OH)Mon. 2/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for OmineliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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. (2002) Ominelite, (Fe,Mg)Al3BSiO9 (Fe2+ analogue of grandidierite), a new mineral from porphyritic granite in Japan. American Mineralogist: 87: 160–170.

Internet Links for OmineliteHide

Localities for OmineliteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • Vysočina Region
    • Žďár nad Sázavou District
      • Křižanov
CEMPÍREK, Jan a Milan NOVÁK a Zdeněk DOLNÍČEK a Jana KOTKOVÁ a Radek ŠKODA. Crystal chemistry and origin of grandidierite, ominelite, boralsilite, and werdingite from the Bory Granulite Massif, Czech Republic American Mineralogist, Mineralogical Society of America, 95, 10, od s. 1533-1547, 15 s. ISSN 0003-004X. 2010
Japan (TL)
 
  • Honshu Island
    • Kinki Region
      • Nara Prefecture
        • Yoshino-gun
          • Tenkawa village
            • Omine Mts
Hiroi Y, Grew E S, Motoyoshi Y, Peacor D R, Rouse R C, Matsubara S, Yokoyama K, Miyawaki R, Mcgee J J, Su S, Hokada T, Furukawa N, Shibasaki H (2001) Ominelite, (Fe,Mg)Al3BSiO9 (Fe2+ analogue of grandidierite), a new mineral from porphyritic granite in Japan. American Mineralogist 87, 160-170
Norway
 
  • Rogaland
    • Lund
      • Flatestøl
Hiroi, Y. et al. (2002): Ominelite, (Fe,Mg)Al3BSiO9 (Fe2+ analogue of grandidierite), a new mineral from porphyritic granite in Japan. American Mineralogist 87: 160- 170 + Kristiansen, R. (2007): Originalbeskrevne mineraler fra Norge i et nytt årtusen. STEIN 34 (1), 30-34
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