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Morimotoite

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About MorimotoiteHide

Nobuo Morimoto
Formula:
Ca3(Ti,Fe2+,Fe3+)2((Si,Fe3+)O4)3
Colour:
Black
Lustre:
Adamantine
Hardness:
Specific Gravity:
3.8
Crystal System:
Isometric
Name:
Named by C. Henmi, I. Kusachi, and K. Henmi in 1992 in honor of Nobuo Morimoto (9 February 1925, Omachi, Nagano Prefecture, Japan - 13 September 2010, Kyoto, Japan), mineralogist and professor at Osaka University and Kyoto University.
This page provides mineralogical data about Morimotoite.


Classification of MorimotoiteHide

Approved
Approval Year:
1992
First Published:
1995
8/A.08-125
9.AD.25

9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination
51.4.3c.3

51 : NESOSILICATES Insular SiO4 Groups Only
4 : Insular SiO4 Groups Only with cations in [6] and >[6] coordination

Physical Properties of MorimotoiteHide

Adamantine
Colour:
Black
Streak:
Grey
Hardness:
7½ on Mohs scale
Hardness Data:
Measured
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
3.8 g/cm3 (Measured)    3.75 g/cm3 (Calculated)

Optical Data of MorimotoiteHide

Type:
Isotropic

Chemical Properties of MorimotoiteHide

Formula:
Ca3(Ti,Fe2+,Fe3+)2((Si,Fe3+)O4)3
IMA Formula:
Ca3(TiFe2+)(SiO4)3
Common Impurities:
Zr,Al,Mn,Mg

Crystallography of MorimotoiteHide

Crystal System:
Isometric
Cell Parameters:
a = 12.162 Å
Unit Cell V:
1,798.93 ų (Calculated from Unit Cell)
Morphology:
subhedral embedded grains

Epitaxial Relationships of MorimotoiteHide

Epitaxial Minerals:
Epitaxy Comments:
outer growth rim

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.04 (70)
2.72 (100)
2.59 (20)
2.48 (50)
2.385 (25)
1.97 (20)
1.69 (30)
1.63 (60)

Type Occurrence of MorimotoiteHide

Place of Conservation of Type Material:
National Science Museum, Tokyo, Japan.
Geological Setting of Type Material:
endoskarn in altered monzonite

Synonyms of MorimotoiteHide

Other Language Names for MorimotoiteHide

German:Morimotoit
Spanish:Morimotoita

Relationship of Morimotoite to other SpeciesHide

Other Members of this group:
AlmandineFe2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
AndraditeCa3Fe3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3Iso.
EringaiteCa3Sc2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
GoldmaniteCa3V3+2(SiO4)3Iso.
GrossularCa3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
KnorringiteMg3Cr2(SiO4)3Iso.
MajoriteMg3(Fe2+,Si,Al)2(SiO4)3Iso.
Menzerite-(Y){(Y,REE),(Ca,Fe2+)}3{(Mg,Fe2+),(Fe3+,Al)}2[SiO4]3Iso. m3m (4/m 3 2/m) : Ia3d
Momoiite(Mn2+,Ca)3V3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
PyropeMg3Al2(SiO4)3Iso.
SpessartineMn2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
UvaroviteCa3Cr2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d

Related Minerals - Nickel-Strunz GroupingHide

9.AD.AdrianiteCa12(Al4Mg3Si7)O32Cl6Iso. 4 3m : I4 3d
9.AD.05LarniteCa2SiO4Mon.
9.AD.10Calcio-olivineCa2SiO4Orth. mmm (2/m 2/m 2/m)
9.AD.15MerwiniteCa3Mg(SiO4)2Mon. 2/m : P21/b
9.AD.20BredigiteCa7Mg(SiO4)4Orth.
9.AD.25AndraditeCa3Fe3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25AlmandineFe2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3Iso.
9.AD.25GoldmaniteCa3V3+2(SiO4)3Iso.
9.AD.25GrossularCa3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AD.25HibschiteCa3Al2(SiO4)3-x(OH)4xIso. m3m (4/m 3 2/m) : Ia3d
9.AD.25HydroandraditeCa3Fe3+2(SiO4)3-x(OH)4x
9.AD.25KatoiteCa3Al2(SiO4)3-x(OH)4x (x = 1.5-3)Iso.
9.AD.25KimzeyiteCa3(Zr,Ti)2((Si,Al,Fe3+)O4)3Iso.
9.AD.25KnorringiteMg3Cr2(SiO4)3Iso.
9.AD.25MajoriteMg3(Fe2+,Si,Al)2(SiO4)3Iso.
9.AD.25PyropeMg3Al2(SiO4)3Iso.
9.AD.25SchorlomiteCa3(Ti,Fe3+)2((Si,Fe3+)O4)3Iso.
9.AD.25SpessartineMn2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25UvaroviteCa3Cr2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25Wadalite(Ca,Mg)6(Al,Fe3+)4((Si,Al)O4)3O4Cl3Iso. 4 3m : I4 3d
9.AD.25HoltstamiteCa3(Al,Mn3+)2(SiO4)2(OH)4Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AD.25KerimasiteCa3Zr2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25ToturiteCa3Sn2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25Momoiite(Mn2+,Ca)3V3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25EltyubyuiteCa12Fe3+10Si4O32Cl6Iso. 4 3m : I4 3d
9.AD.25HutcheoniteCa3Ti2(SiAl2)O12Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.30CoffiniteU(SiO4) · nH2OTet.
9.AD.30HafnonHfSiO4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30ThoriteTh(SiO4)Tet.
9.AD.30ZirconZr(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30Stetindite-(Ce)Ce(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.35HuttoniteThSiO4Mon.
9.AD.35Tombarthite-(Y)Y4(Si,H4)4O12-x(OH)4+2xMon.
9.AD.40EulytineBi4(SiO4)3Iso. 4 3m : I4 3d
9.AD.45ReiditeZrSiO4Tet. 4/m : I41/a

Related Minerals - Dana Grouping (8th Ed.)Hide

51.4.3c.1SchorlomiteCa3(Ti,Fe3+)2((Si,Fe3+)O4)3Iso.
51.4.3c.2KimzeyiteCa3(Zr,Ti)2((Si,Al,Fe3+)O4)3Iso.

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 MorimotoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Magazine: 27: 304.
Jambor, J.L., Roberts, A.C. (1995) New mineral names. American Mineralogist: 80: 1073-1077.
Henmi, C., Kusachi, I., Henmi, K. (1995) Morimotoite, Ca3TiFe2+Si3O12, a new titanian garnet from Fuka, Okayama Prefecture, Japan. Mineralogical Magazine: 59: 115-120.
Rass, I.T. (1997) Morimotoite, a new titanian garnet? — discussion. Mineralogical Magazine: 61: 728-730.
Armbruster, Th., Birrer, J., Libowitzky, E., Beran, A. (1998) Crystal chemistry of Ti-bearing andradites. European Journal of Mineralogy: 10: 907-921.
Grew, E.S., Locock, A.J., Mills, S.J., Galuskina, I.O., Galuskin, E.V., Hålenius, U. (2013) Nomenclature of the garnet supergroup. American Mineralogist: 98: 785-811.
Schingaro, E., Lacalamita, M., Mesto, E., Ventruti, G., Pedrazzi, G., Ottolini, L., Scordari, F. (2016) Crystal chemistry and light elements analysis of Ti-rich garnets. American Mineralogist: 101: 371-384.

Internet Links for MorimotoiteHide

Localities for MorimotoiteHide

ⓘ - 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.
Canada
 
  • British Columbia
    • Golden Mining Division
Antao, S.M. (2014): Crystal structure of morimotoite from Ice River, Canada. Powder Diffraction, 29, 325-330.
Japan (TL)
 
  • Honshu Island
    • Chugoku Region
      • Okayama Prefecture
        • Takahashi City
          • Bicchu-cho (Bitchu-cho)
            • Fuka
Mineralogical Magazine (1995): 59: 115-120; Mineralogical Record: 27: 304.
Russia
 
  • Murmansk Oblast
    • Khibiny Massif
Mikhailova, Y.A., Konopleva, N.G., Yakovenchuk, V.N., Ivanyuk, G.Y., Men’shikov, Y.P., and Pakhomovsky, Y.A. (2007): Geology of Ore Deposits 49(7), 590-598.
  • Sakhalinskaya Oblast
    • Sakhalin Island
      • Morotu (Morotsu; Morutu)
Grapes, R., Yagi, K., and Okumura, K. (1979) Aenigmatite, sodic pyroxene, arfvedsonite and associated minerals in syenites from Morotu, Sakhalin. Contributions to Mineralogy and Petrology, 69, 97–103.
USA
 
  • California
Armbruster, Th., Birrer, J., Libowitzky, E., Beran, A. (1998): Crystal chemistry of Ti-bearing andradites, European Journal of Mineralogy, Vol. 10, 907-921
Mineral and/or Locality  
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