Morimotoite Mineral Data

General Morimotoite Information

Chemical Formula:

Ca3TiFe++Si3O12

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

Empirical Formula:

Ca₃TiFe²⁺Si₃O₁₂

Environment:

In skarns along a quartz monzonite dike which cuts limestones.

IMA Status:

Approved IMA 1995

Locality:

Fuka, Bitchu-Cho, Okayama Prefeture, Japan. Link to MinDat.org Location Data.

Name Origin:

For Dr. Nobuo Morimoto (1926- ), Professor Emeritus of Osaka University.

Name Pronunciation:

Morimotoite + Pronunciation

Synonym:

IMA1992-017

Morimotoite Image

Images:

Morimotoite

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

Cell Dimensions:

a = 12.162, Z = 8; V = 1,798.93 Den(Calc)= 3.69

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/I_o): 2.72(1), 3.039(0.72), 1.626(0.56),

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Physical Properties of Morimotoite

Cleavage:

None

Color:

Black.

Density:

3.75

Diaphaneity:

Opaque

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Hardness:

7.5 - Garnet

Luminescence:

Non-fluorescent.

Luster:

Adamantine

Streak:

gray

Optical Properties of Morimotoite

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

Optical Data:

Isotropic, n=1.995.

Calculated Properties of Morimotoite

Electron Density:

Bulk Density (Electron Density)=3.69 gm/cc
note: Specific Gravity of Morimotoite =3.75 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Morimotoite= 8.49 barns/electron
U=PE_Morimotoite x rElectron Density= 31.31 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Morimotoite is Not Radioactive

Morimotoite Classification

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

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

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.80,p1074,1995) OPTIC PROP.(MinRec)

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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Print or Cut-and-Paste your Morimotoite Specimen Label here :

Morimotoite

Ca3TiFe++Si3O12
Dana No: 51.04.03c.03 Strunz No: 09.AD.25
Locality:

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