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Yamatoite

A discredited species name
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Formula:
(Mn2+,Ca)3(V3+,Al)2(SiO4)3
Hardness:
6 - 7
Crystal System:
Isometric
Name:
For the Yamato manganese mine.
Discredited member of Garnet Group; discredited since the type material was not truly Mn-V-dominant. Subsequently submitted as IMA 2009-026 (momoiite) using material from a different locality.

Originally reported from Yamato mine, Amami-Oshima Island, Kagoshima Prefecture, Nansei Archipelago, Japan.


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Unique IdentifiersHide

Mindat ID:
7376
Long-form identifier:
mindat:1:1:7376:5

IMA Classification of YamatoiteHide

IMA status:
Discredited

Classification of YamatoiteHide

Strunz-mindat (2025):
9.AD.25 va

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

Physical Properties of YamatoiteHide

Hardness:
6 - 7 on Mohs scale

Optical Data of YamatoiteHide

Type:
Isotropic

Chemistry of YamatoiteHide

Mindat Formula:
(Mn2+,Ca)3(V3+,Al)2(SiO4)3
Element Weights:
Element% weight
O35.361 %
Mn30.356 %
V18.765 %
Si15.518 %

Calculated from ideal end-member formula.
Elements listed:
Al, Ca, Mn, O, Si, V - search for minerals with similar chemistry

Crystallography of YamatoiteHide

Crystal System:
Isometric

Other Language Names for YamatoiteHide

German:Yamatoit
Spanish:Yamatoita

Related Minerals - Strunz-mindat GroupingHide

9.AD.AdrianiteCa12(Al4Mg3Si7)O32Cl6Iso. 4 3m : I4 3d
9.AD.05LarniteCa2SiO4Mon. 2/m
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. mm2 : Pnn2
9.AD.25MidbariteCa3Mg2(V2Si)O12Iso. m3m (4/m 3 2/m)
9.AD.25Menzerite-(Y)(Y2Ca)Mg2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25UvaroviteCa3Cr2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25EltyubyuiteCa12Fe3+10Si4O32Cl6Iso. 4 3m : I4 3d
9.AD.25EringaiteCa3Sc2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25HenritermieriteCa3Mn3+2(SiO4)2[◻(OH)4]Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AD.25 vaHydrougrandite(Ca,Mg,Fe2+)3(Fe3+,Al)2[(OH)4(SiO4)2]Iso.
9.AD.25CalderiteMn2+3Fe3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25NikmelnikoviteCa12(Fe2+Fe3+3Al3◻)[SiO4]6[◻(OH)4]5◻4Trig. 3 : R3
9.AD.25HutcheoniteCa3Ti2(SiO4)(AlO4)2Iso. 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.25RubiniteCa3Ti3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25KerimasiteCa3Zr2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25HoltstamiteCa3Al2(SiO4)2[◻(OH)4]Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AD.25SpessartineMn2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25ToturiteCa3Sn2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25KimzeyiteCa3Zr2(SiO4)(AlO4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25KhohariteMg3Fe3+2(SiO4)3
9.AD.25IrinarassiteCa3Sn2(SiO4)(AlO4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25KnorringiteMg3Cr2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25GoldmaniteCa3V3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25BlythiteMn2+3Mn3+2[SiO4]3
9.AD.25SkiagiteFe2+3Fe3+2[SiO4]3
9.AD.25UM1984-37-SiO:CrMnMn2+3Cr3+2(SiO4)3
9.AD.25AlmandineFe2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25MomoiiteMn2+3V3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25GrossularCa3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25AndraditeCa3Fe3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25MorimotoiteCa3(TiFe2+)(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25MajoriteMg3(MgSi)(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25PyropeMg3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.30HafnonHf(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30ZirconZr(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30CoffiniteU(SiO4) · nH2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30ThoriteTh(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30 vaAuerlitenear Th(Si,P)O4
9.AD.30Stetindite-(Ce)Ce(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.35Tombarthite-(Y)Y4(Si,H4)4O12-x(OH)4+2xMon.
9.AD.35HuttoniteThSiO4Mon. 2/m
9.AD.40EulytineBi4(SiO4)3Iso. 4 3m : I4 3d
9.AD.45ReiditeZr(SiO4)Tet. 4/m : I41/a
9.AD.55JeffbeniteMg3Al2Si3O12Tet. 4 2m : I4 2d

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.

Internet Links for YamatoiteHide

References for YamatoiteHide

Localities for YamatoiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Japan
 
  • Ehime Prefecture
    • Saijo City
Färber (n.d.)
  • Kagoshima Prefecture
    • Oshima District
      • Yamato village
Momoi (1964)
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