Morimotoite Mineral Data

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.

Synonym:

IMA1992-017

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Morimotoite Crystallography

Cell Dimensions:

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

Crystal System:

Isometric - HexoctahedralH-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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Forms: [ 2 1 1]

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Physical Properties of Morimotoite

Cleavage:

None

Color:

Black.

Density:

3.75

Diaphaniety:

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

Optical Data:

Isotropic, n=1.995.

Calculated Properties of Morimotoite

Electron Density:

r_electron=3.69 gm/cc
note: r_Morimotoite=3.75 gm/cc.

Fermion Index

Fermion Index = 0.02311
Boson Index = 0.97689

Photoelectric:

PE_Morimotoite= 8.49 barns/electron
U=PE_Morimotoite x r_electron= 31.31 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Morimotoite is Not Radioactive

Morimotoite Classification

Dana Class:

51.4.3c.3 (51)Nesosilicate Insular SiO4 Groups Only

(51.4)with cations in [6] and >[6] coordination

(51.4.3c)Garnet group (Schorlomite - Kimzeyite series)

51.4.3c.1 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m

51.4.3c.2 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m

51.4.3c.3 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m

Strunz Class:

VIII/A.08-125 VIII - Silicates

VIII/A - Nesosilicates with [SiO4]4-groups, cations of octahedral and cubic orientation [8+6]

VIII/A.08 - Garnet group, Pyrope - Henritermierite

VIII/A.08-10 Pyrope Mg3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-20 Almandine Fe3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-30 Spessartine Mn3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-40 Calderite (Mn,Ca)3(Fe,Al)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-50 Knorringite Mg3Cr2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-60 Majorite Mg3(Fe,Al,Si)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-70 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-80 Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) I a3d 4/m 3 2/m

VIII/A.08-90 Katoite Ca3Al2(SiO4)3-x(OH)4xx=1.5-3 I a3d 4/m 3 2/m

VIII/A.08-100 Hydrougrandite? (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m

VIII/A.08-110 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-120 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m

VIII/A.08-125 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m

VIII/A.08-130 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-138 Yamatoite! (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-140 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-150 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m

VIII/A.08-160 Henritermierite Ca3(Mn,Al)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 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 - Mineral and Gemstone Kingdom 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Morimotoite

Ca3TiFe++Si3O12
Dana No: 51.4.3c.3 Strunz No: VIII/A.08-125
Locality:

Notes: