Mineralogy Database

Yamatoite Mineral Data

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General Yamatoite Information

Help on Chemical  Formula: Chemical Formula: (Mn++,Ca)3(V+++,Al)2(SiO4)3
Help on Composition: Composition: Molecular Weight = 519.82 gm
   Calcium     5.78 %  Ca    8.09 % CaO
   Manganese  23.78 %  Mn   30.70 % MnO
   Aluminum    2.60 %  Al    4.90 % Al2O3
   Vanadium   14.70 %  V    21.62 % V2O3
   Silicon    16.21 %  Si   34.68 % SiO2
   Oxygen     36.93 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+2.25Ca0.75V3+1.5Al0.5(SiO4)3
Help on Environment: Environment: Discredited as Mn goldmanite, yet to be found in nature. A hypothicical Mn-V-dominant garnet end member.
Help on IMA Status: IMA Status: Discredited IMA 1967 (Dana # Added)
Help on Locality: Locality: Yamato mine, Kagoshima prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.

Yamatoite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 11.97, Z = 5; V = 1,715.07 Den(Calc)= 2.52
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.69(1), 3.01(0.7), 1.61(0.5),2.45(0.4), 1.67(0.2), 1.95(0.2), 2.19(0.2), 2.36(0.2),

Physical Properties of Yamatoite

Help on Cleavage: Cleavage: None
Help on Color: Color: Honey yellow, Dark red.
Help on Hardness: Hardness: 6-7 - Orthoclase-Quartz
Help on Streak: Streak: white

Optical Properties of Yamatoite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.512 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3327,KC= 0.2201
Ncalc = 1.55
Help on Optical Data: Optical Data: Isotropic, n=1.822-1.855.

Calculated Properties of Yamatoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.43 gm/cc
note: Specific Gravity of Yamatoite =2.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0081923223
Boson Index = 0.9918076777
Help on Photoelectric: Photoelectric: PEYamatoite = 10.33 barns/electron
U=PEYamatoite x rElectron Density= 25.07 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yamatoite is Not Radioactive

Yamatoite Classification

Help on  Dana Class: Dana Class: 51.04.03b.05 (51)Nesosilicate Insular SiO4 Groups Only
  (51.04)with cations in [6] and >[6] coordination
  (51.04.03b)Garnet group (Ugrandite series)
51.04.03b.01 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m
51.04.03b.02 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m
51.04.03b.03 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m
51.04.03b.04 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m
51.04.03b.05 Yamatoite? (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 09.AX.00 09 - SILICATES (Germanates)
  09.A - Unclassified Strunz Nesosilicates
  09.AX -Garnet - Mn
09.AX.00 Hydrougrandite? (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m
09.AX.00 Yamatoite! (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m

Other Yamatoite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Yamatoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: 51.04.03b.05 Strunz No: 09.AX.00





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