Classification of Morimotoite |
| IMA status: | Approved 1992 |
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| Strunz 8th edition ID: | 8/A.08-125
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| Nickel-Strunz 10th (pending) edition ID: | 9.AD.25
9 : SILICATES (Germanates) A : Nesosilicates D : Nesosilicates without additional anions; cations in [6] and/or greater coordination |
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| Dana 8th edition ID: | 51.4.3c.3
51 : NESOSILICATES Insular SiO4 Groups Only 4 : Insular SiO4 Groups Only with cations in [6] and >[6] coordination |
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Type Occurrence of Morimotoite |
| Type Locality: | Fuka mine, Bitchu-cho (Bicchu-cho), Takahashi, Okayama Prefecture, Chugoku Region, Honshu Island, Japan |
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| Year of Discovery: | 1995 |
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| Geological Setting of type material: | endoskarn in altered monzonite |
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Physical Properties of Morimotoite |
| Lustre: | Adamantine |
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| Diaphaneity (Transparency): | Translucent on thin edges |
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| Colour: | Black |
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| Streak: | Grey |
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| Hardness (Mohs): | 7½ |
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| Hardness Data: | Measured |
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| Cleavage: | None Observed |
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| Fracture: | Irregular/Uneven, Sub-Conchoidal |
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| Density (measured): | 3.8 g/cm3 |
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| Density (calculated): | 3.75 g/cm3 |
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Crystallography of Morimotoite |
| Crystal System: | Isometric |
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| Cell Parameters: | a = 12.162Å
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| Unit Cell Volume: | V 1,798.93 ų (Calculated from Unit Cell) |
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| Morphology: | subhedral embedded grains |
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Epitaxial Relationships of Morimotoite |
| Epitaxial Minerals: | |
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| Epitaxi Comments: | outer growth rim |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 3.04 | | (70) | | 2.72 | | (100) | | 2.59 | | (20) | | 2.48 | | (50) | | 2.385 | | (25) | | 1.97 | | (20) | | 1.69 | | (30) |
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Optical Data of Morimotoite |
| Type: | Isotropic |
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Chemical Properties of Morimotoite |
| Formula: | | Ca | | (Ti,Fe | | ,Fe | | ) | | [(Si,Fe | | )O | | ] | | (?) |
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| Essential elements: | Ca, Fe, O, Si, Ti |
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| All elements listed in formula: | Ca, Fe, O, Si, Ti |
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| Analyical Data: | SiO2 (26.9)
TiO2 (18.5)
ZrO2 (1.48)
Al2O3 (0.97)
Fe2O3 (11.4)
FeO (7.78)
MnO (0.23)
MgO (0.87)
CaO (31.35) |
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| Common Impurities: | Zr,Al,Mn,Mg |
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Relationship of Morimotoite to other Species |
| Member of: | Garnet Group |
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| Related Minerals - Nickel-Strunz Grouping): | |
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Other Names for Morimotoite |
| Synonyms: | |
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| German names: | |
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| Spanish names: | |
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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. |
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References for Morimotoite |
| Reference List: | Mineralogical Magazine: 27: 304.
Henmi, et al. (1995), Mineralogical Magazine: 59: 115-120.
Mineralogical Magazine (1997): 61: 728-730.
Armbruster, Th., Birrer, J., Libowitzky, E., Beran, A. (1998): Crystal chemistry of Ti-bearing andradites, European Journal of Mineralogy, Vol. 10, 907-921 |
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Internet Links for Morimotoite |
| Search Engines: |
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| External Links: | Look for Morimotoite on WebmineralLook for Morimotoite on Athena MineralogyLook for Morimotoite on WikipediaLook for Morimotoite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Morimotoite in the Natural History Museum (London) online catalogue |
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Localities for Morimotoite |