Mineralogy Database

Morimotoite Mineral Data

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General Morimotoite Information

Help on Chemical  Formula: Chemical Formula: Ca3TiFe++Si3O12
Help on Composition: Composition: Molecular Weight = 500.21 gm
   Calcium   24.04 %  Ca   33.63 % CaO
   Titanium   9.57 %  Ti   15.97 % TiO2
   Iron      11.16 %  Fe   14.36 % FeO
   Silicon   16.84 %  Si   36.04 % SiO2
   Oxygen    38.38 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3TiFe2+Si3O12
Help on Environment: Environment: In skarns along a quartz monzonite dike which cuts limestones.
Help on IMA Status: IMA Status: Approved IMA 1995
Help on Locality: Locality: Fuka, Bitchu-Cho, Okayama Prefeture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Dr. Nobuo Morimoto (1926- ), Professor Emeritus of Osaka University.
Help on Name Pronunciation: Name Pronunciation: Morimotoite + Pronunciation Say MORIMOTOITE
Help on Synonym: Synonym: IMA1992-017

Morimotoite Image

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Comments: Dark-brown morimotoite grains in calcite-wollastonite skarn from the type locality, ID confirmed by microprobe and XRD analyses.
Location: Fuka mine, Bitchu-cho (Bicchu-cho), Takahashi, Okayama Prefecture, Chugoku Region, Honshu Island, Japan. Collected by Igor V. Pekov in 2007 under supervising of the specie author from the same point of the outcrop as and holotype specimen. Scale: Specimen Size 17x12x7 mm.
© Pavel M. Kartashov

Morimotoite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 12.162, Z = 8; V = 1,798.93 Den(Calc)= 3.69
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): 2.72(1), 3.039(0.72), 1.626(0.56),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 2 1 1)

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Physical Properties of Morimotoite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 3.75
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: gray

Optical Properties of Morimotoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.127 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.146 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2696,KPDmeas= 0.2653,KC= 0.2353
Ncalc = 1.87 - 1.88
Help on Optical Data: Optical Data: Isotropic, n=1.995.

Calculated Properties of Morimotoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.69 gm/cc
note: Specific Gravity of Morimotoite =3.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEMorimotoite = 8.49 barns/electron
U=PEMorimotoite x rElectron Density= 31.31 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Morimotoite is Not Radioactive

Morimotoite Classification

Help on  Dana Class: Dana Class: 51.04.03c.03 (51)Nesosilicate Insular SiO4 Groups Only
  (51.04)with cations in [6] and >[6] coordination
  (51.04.03c)Garnet group (Schorlomite - Kimzeyite series)
51.04.03c.01 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m
51.04.03c.02 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m
51.04.03c.03 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 09.AD.25 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AD -Nesosilicates without additional anions;
09.AD.25 Almandine Fe3Al2(SiO4)3 I a3d 4/m 3 2/m
09.AD.25 Calderite (Mn,Ca)3(Fe,Al)2(SiO4)3 I a3d 4/m 3 2/m
09.AD.25 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m
09.AD.25 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m
09.AD.25 Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) I a3d 4/m 3 2/m
09.AD.25 Knorringite Mg3Cr2(SiO4)3 I a3d 4/m 3 2/m
09.AD.25 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m
09.AD.25 Henritermierite Ca3(Mn,Al)2(SiO4)2(OH)4 I 41/acd 4/m 2/m 2/m
09.AD.25 Katoite Ca3Al2(SiO4)3-x(OH)4xx=1.5-3 I a3d 4/m 3 2/m
09.AD.25 Majorite Mg3(Fe,Al,Si)2(SiO4)3 I a3d 4/m 3 2/m
09.AD.25 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m
09.AD.25 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m
09.AD.25 Pyrope Mg3Al2(SiO4)3 I a3d 4/m 3 2/m
09.AD.25 Spessartine Mn3Al2(SiO4)3 I a3d 4/m 3 2/m
09.AD.25 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m
09.AD.25 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m
09.AD.25 Wadalite Ca6Al5Si2O16Cl3 I 43d 4 3m
09.AD.25 Holtstamite! Ca3(Al,Mn)2(SiO4)2(OH)4 I 41/acd 4/m 2/m 2/m

Other Morimotoite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.80,p1074,1995) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Morimotoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: 51.04.03c.03 Strunz No: 09.AD.25





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