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Momoiite

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Formula:
(Mn2+,Ca)3V23+(SiO4)3
System:
Isometric
Name:
In honour of Professor Hitoshi Momoi (1930-2002) who first recognised the presence of a Mn3V2Si3O12 component in garnet.
Garnet Group.
A garnet with this formula had previously been described as "Yamatoite" (qv), a species which was later discredited because the type material was not truly Mn-V-dominant, although the name "yamatoite" continued to be used for the hypothetical Mn-V-garnet molecule.

Classification of Momoiite

Approved 2009
9.AD.25

9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination
51.4.4.5

51 : NESOSILICATES Insular SiO4 Groups Only
4 : Insular SiO4 Groups Only with cations in [6] and >[6] coordination
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First Recorded Occurrence of Momoiite

Crystallography of Momoiite

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Ia3d
Cell Parameters:
a = 11.9242(7) Å
Unit Cell Volume:
V 1,695.46 ų (Calculated from Unit Cell)
Comment:
Ia-3d
X-Ray Powder Diffraction Data:
d-spacingIntensity
2.982 (78)
2.667 (100)
2.435 (42)
2.339 (20)
2.178 (20)
1.935 (21)
1.654 (20)
1.594 (30)

Chemical Properties of Momoiite

Formula:
(Mn2+,Ca)3V23+(SiO4)3
Essential elements:
All elements listed in formula:

Relationship of Momoiite to other Species

Other Members of Group:
AlmandineFe32+Al2(SiO4)3
AndraditeCa3Fe23+(SiO4)3
BerzeliiteNaCa2(Mg,Mn2+)2(AsO4)3
BitikleiteCa3SbSn(AlO4)3
BlythiteMn32+Mn23+[SiO4]3
Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
DzhuluiteCa3SbSnFe33+O12
ElbrusiteCa3U6+ZrFe23+Fe2+O12
GoldmaniteCa3V23+(SiO4)3
GrossularCa3Al2(SiO4)3
HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4
HutcheoniteCa3Ti2(SiAl2)O12
IrinarassiteCa3Sn2Al2SiO12
KatoiteCa3Al2(SiO4)3-x(OH)4x
KerimasiteCa3Zr2(SiO4)(Fe3+O4)2
KhohariteMg3Fe23+(SiO4)3
KimzeyiteCa3(Zr,Ti)2((Si,Al,Fe3+)O4)3
KnorringiteMg3Cr2(SiO4)3
MajoriteMg3(Fe2+,Si,Al)2(SiO4)3
Menzerite-(Y){(Y,REE),(Ca,Fe2+)}3{(Mg,Fe2+),(Fe3+,Al)}2[SiO4]3
MorimotoiteCa3(Ti,Fe2+,Fe3+)2((Si,Fe3+)O4)3
Palenzonaite(Ca,Na)3CaMn22+(VO4)3
PyropeMg3Al2(SiO4)3
SchäferiteCa2NaMg2(VO4)3
SchorlomiteCa3(Ti,Fe3+)2((Si,Fe3+)O4)3
SkiagiteFe32+Fe23+[SiO4]3
SpessartineMn32+Al2(SiO4)3
ToturiteCa3Sn2(SiO4)(Fe3+O4)2
UsturiteCa3SbZr(Fe3+O4)3
UvaroviteCa3Cr2(SiO4)3
YafsoaniteCa3Zn3(TeO6)2
9.AD.05LarniteCa2SiO4
9.AD.10Calcio-olivineCa2SiO4
9.AD.15MerwiniteCa3Mg(SiO4)2
9.AD.20BredigiteCa7Mg(SiO4)4
9.AD.25AndraditeCa3Fe23+(SiO4)3
9.AD.25AlmandineFe32+Al2(SiO4)3
9.AD.25Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
9.AD.25GoldmaniteCa3V23+(SiO4)3
9.AD.25GrossularCa3Al2(SiO4)3
9.AD.25HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4
9.AD.25HibschiteCa3Al2(SiO4)3-x(OH)4x
9.AD.25HydroandraditeCa3Fe23+(SiO4)3-x(OH)4x
9.AD.25KatoiteCa3Al2(SiO4)3-x(OH)4x
9.AD.25KimzeyiteCa3(Zr,Ti)2((Si,Al,Fe3+)O4)3
9.AD.25KnorringiteMg3Cr2(SiO4)3
9.AD.25MajoriteMg3(Fe2+,Si,Al)2(SiO4)3
9.AD.25MorimotoiteCa3(Ti,Fe2+,Fe3+)2((Si,Fe3+)O4)3
9.AD.25PyropeMg3Al2(SiO4)3
9.AD.25SchorlomiteCa3(Ti,Fe3+)2((Si,Fe3+)O4)3
9.AD.25SpessartineMn32+Al2(SiO4)3
9.AD.25UvaroviteCa3Cr2(SiO4)3
9.AD.25Wadalite(Ca,Mg)6(Al,Fe3+)4((Si,Al)O4)3O4Cl3
9.AD.25HoltstamiteCa3(Al,Mn3+)2(SiO4)2(OH)4
9.AD.25KerimasiteCa3Zr2(SiO4)(Fe3+O4)2
9.AD.25ToturiteCa3Sn2(SiO4)(Fe3+O4)2
9.AD.25EltyubyuiteCa12Fe103+Si4O32Cl6
9.AD.25HutcheoniteCa3Ti2(SiAl2)O12
9.AD.30Coffinite(U4+,Th)(SiO4)1-x(OH)4x
9.AD.30HafnonHfSiO4
9.AD.30Thorite(Th,U)SiO4
9.AD.30ZirconZrSiO4
9.AD.30StetinditeCe4+SiO4
9.AD.35HuttoniteThSiO4
9.AD.35Tombarthite-(Y)Y4(Si,H4)4O12-x(OH)4+2x
9.AD.40EulytineBi4(SiO4)3
9.AD.45ReiditeZrSiO4

Other Names for Momoiite

Name in Other Languages:

Other Information

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 Momoiite

Reference List:
IMA Approvals - August 2009

Tanaka, H. et al. (2010) Momoiite (Mn2+,Ca)3(V3+,Al)2Si3O12, a new manganese vanadium garnet from Japan. Journal of Mineralogical and Petrological Sciences 105, 92-96. [http://www.jstage.jst.go.jp/article/jmps/105/2/92/_pdf]

Internet Links for Momoiite

Localities for Momoiite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Japan
 
  • Honshu Island
    • Chubu Region
      • Fukui Prefecture
        • Mikata-kaminaka-gun
          • Wakasa-cho
Tanaka, H. et al. (2010) Momoiite (Mn2+,Ca)3(V3+,Al)2Si3O12, a new manganese vanadium garnet from Japan. Journal of Mineralogical and Petrological Sciences 105, 92-96. [http://www.jstage.jst.go.jp/article/jmps/105/2/92/_pdf]
    • Kinki Region
      • Kyoto Prefecture
        • Kizugawa City
Tanaka, H. et al. (2010) Momoiite (Mn2+,Ca)3(V3+,Al)2Si3O12, a new manganese vanadium garnet from Japan. Journal of Mineralogical and Petrological Sciences 105, 92-96. [http://www.jstage.jst.go.jp/article/jmps/105/2/92/_pdf]
    • Tohoku Region
      • Iwate Prefecture
        • Shimohei-gun
Satoshi Matsubara, et al (2008) JAKOKA: 2008 Annual Meeting of the Japan Association of Mineralogical Sciences, R4-02
Matsubara, S., Miyawaki, R., Yokoyama, K., Shigeoka, M., Miyajima, H., Suzuki, Y., ... & Ishibashi, T. (2010). Momoiite and nagashimalite from the Tanohata mine, Iwate Prefecture, Japan. Bulletin of the National Museum of Nature and Science C, 36, 1-6.
  • Shikoku Island
    • Ehime Prefecture
      • Saijo City
Tanaka, H. et al. (2010) Momoiite (Mn2+,Ca)3(V3+,Al)2Si3O12, a new manganese vanadium garnet from Japan. Journal of Mineralogical and Petrological Sciences 105, 92-96. [http://www.jstage.jst.go.jp/article/jmps/105/2/92/_pdf]
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