Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (6 online) Mindat Auctions

Yamatoite

Formula:
(Mn
2+
 
,Ca)
 
3
(V
3+
 
,Al)
 
2
[SiO
 
4
]
 
3
System:IsometricHardness:6 - 7
Name:For the Yamato manganese mine.


Discredited member of Garnet Group. Resubmitted as IMA 2009-026.

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

Classification of Yamatoite

IMA status:Discredited 1967
Explanation of status:"Yamatoite" from the Yamato manganese mine is a Mn-rich goldmanite with 40-50% of the "yamatoite" "molecule". Nowadays the name "yamatoite" is still used for the hypothetical Mn-V-dominant garnet molecule and for synthesized equivalents.
Strunz 8th edition ID:8/A.08-138

8 : Silicates
A : Nesosilicates, with [SiO4]4- groups, cations of tetrahedric orientation [4]
08 : Garnet group, Pyrope - Henritermierite
mindat.org URL:http://www.mindat.org/min-7376.html
Please feel free to link to this page.

Physical Properties of Yamatoite

Hardness (Mohs):6 - 7

Crystallography of Yamatoite

Crystal System:Isometric

Optical Data of Yamatoite

Type:Isotropic

Chemical Properties of Yamatoite

Formula:
(Mn
2+
 
,Ca)
 
3
(V
3+
 
,Al)
 
2
[SiO
 
4
]
 
3
Essential elements:Mn, O, Si, V
All elements listed in formula:Al, Ca, Mn, O, Si, V

Relationship of Yamatoite to other Species

Related Minerals - Strunz Grouping):

- +
8/A.08-10Pyrope
Mg
 
3
Al
 
2
[SiO
 
4
]
 
3
8/A.08-20Almandine
Fe
2+
3
Al
 
2
[SiO
 
4
]
 
3
8/A.08-30Spessartine
Mn
2+
3
Al
 
2
[SiO
 
4
]
 
3
8/A.08-40Calderite
(Mn
2+
 
,Ca)
 
3
(Fe
3+
 
,Al)
 
2
[SiO
 
4
]
 
3
8/A.08-50Knorringite
Mg
 
3
Cr
 
2
[SiO
 
4
]
 
3
8/A.08-60Majorite
Mg
 
3
(Fe
2+
 
,Si,Al)
 
2
[SiO
 
4
]
 
3
8/A.08-70Grossular
Ca
 
3
Al
 
2
[SiO
 
4
]
 
3
8/A.08-80Hibschite
Ca
 
3
Al
 
2
[(OH)
 
6-1
|(SiO
 
4
)
 
1.5-2.5
]
8/A.08-90Katoite
Ca
 
3
Al
 
2
[(OH)
 
8-6
|(SiO
 
4
)
 
1-1.5
]
8/A.08-100Hydrougrandite
(Ca,Mg,Fe
2+
 
)
 
3
(Fe
3+
 
,Al)
 
2
[(OH)
 
4
|(SiO
 
4
)
 
2
]
8/A.08-110Andradite
Ca
 
3
Fe
3+
2
[SiO
 
4
]
 
3
8/A.08-120Schorlomite
Ca
 
3
(Ti,Fe
3+
 
)
 
2
[(Si,Fe
3+
 
,Fe
2+
 
)O
 
4
]
 
3
8/A.08-125Morimotoite
Ca
 
3
(Ti,Fe
2+
 
,Fe
3+
 
)
 
2
[(Si,Fe
3+
 
)O
 
4
]
 
3
 (?)
8/A.08-130Uvarovite
Ca
 
3
Cr
 
2
[SiO
 
4
]
 
3
8/A.08-140Goldmanite
Ca
 
3
(V
3+
 
,Al,Fe
3+
 
)
 
2
[SiO
 
4
]
 
3
8/A.08-150Kimzeyite
Ca
 
3
(Zr,Ti)
 
2
[(Si,Al,Fe
3+
 
)O
 
4
]
 
3
8/A.08-155Wadalite
Ca
 
6
(Al,Mg)
 
4
[Cl
 
3
|O
 
4
|{(Si,Al,Fe
3+
 
)O
 
4
}
 
3
]
8/A.08-160Henritermierite
Ca
 
3
(Mn
3+
 
,Al)
 
2
[(OH)
 
4
|(SiO
 
4
)
 
2
]

Other Names for Yamatoite

Other Languages:
German:Yamatoit
Spanish:Yamatoita

Other Information

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

References for Yamatoite

Reference List:Momoi (1964) Memoirs of the Faculty of Science, Kyushu University, series D, 15, 73-78.

Min.Mag. (1967), 36, 133

Internet Links for Yamatoite

Search Engines:
  • Look for Yamatoite on Google
  • Look for Yamatoite images on Google
    • Mineral Dealers:
  • Wilensky Fine Minerals
  • Fine Minerals from Dan Weinrich Minerals
  • Buy Fine Minerals from mineralsweb.com
  • Lapis Mineral Magazin
  • Buy from David K Joyce minerals
  • Fabre Minerals - search for Yamatoite specimens
  • Rare and Unusual minerals at Mineralogical Research Company
  • rare and unusual minerals mainly crystallized
  • Buy fine minerals and gemstones from Pala International
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Find Yamatoite on www.crystalclassics.co.uk
  • Top quality minerals from Kristalle of California
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Yamatoite

    (TL) indicates type locality. ? 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
     
    • Nansei Archipelago
      • Kagoshima Prefecture
        • Amami-Oshima Island
    		Momoi (1964) Memoirs of the Faculty of Science, Kyushu University, series D,　15, 73-78.
    • Shikoku Island
      • Ehime Prefecture
        • Saijo City
    		Gunnar Farber specimens
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 16th Nov 2009 10:18:25