Classification of Protoanthophyllite |
| IMA status: | Approved 2001 |
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| Explanation of status: | IMA 2001-065 |
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| Strunz 8th edition ID: | 8/F.12-140
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| Nickel-Strunz 10th (pending) edition ID: | 9.DD.05
9 : SILICATES (Germanates) D : Inosilicates D : Inosilicates with 2-periodic double chains, Si4O11; Orthoamphiboles |
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| mindat.org URL: | http://www.mindat.org/min-11477.html Please feel free to link to this page. |
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Type Occurrence of Protoanthophyllite |
| Type Locality: | Takase mine, Okayama Prefecture, Chugoku Region, Honshu Island, Japan |
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| General Appearance of Type Material: | acicular prisms to 10 mm |
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| Place of Conservation of Type Material: | Natural Science Museum, Tokyo |
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| Geological Setting of type material: | contact-metamorphosed serpentinite |
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| Associated Minerals at type locality: | |
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Occurrences of Protoanthophyllite |
| Geological Setting: | metamorphosed serpentinites |
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Physical Properties of Protoanthophyllite |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Transparent |
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| Colour: | colourless to white |
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| Streak: | white |
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| Hardness (Mohs): | 6 |
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| Tenacity: | Brittle |
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| Cleavage: | Perfect on {110} |
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| Density (measured): | 2.98 g/cm3 |
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Crystallography of Protoanthophyllite |
| Crystal System: | Orthorhombic |
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| Class (H-M): | mmm (2/m 2/m 2/m) - Dipyramidal |
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| Cell Parameters: | a = 9.355Å, b = 17.93Å, c = 5.311Å
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| Ratio: | a:b:c = 0.522 : 1 : 0.296 |
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| Unit Cell Volume: | V 890.84 ų (Calculated from Unit Cell) |
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| Morphology: | prismatic crystals, elongated parallel to [001] |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 8.32 | | (70) | | 3.66 | | (100) | | 3.08 | | (80) |
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Chemical Properties of Protoanthophyllite |
| Formula: | |
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| All elements listed in formula: | H, Mg, O, Si |
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| Common Impurities: | Na,Mn,Ni,Al |
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Relationship of Protoanthophyllite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Protoanthophyllite |
| Other Languages: | |
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Other Information |
| Fluorescence in UV light: | none |
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| 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 Protoanthophyllite |
| Reference List: | Sueno, S., Matsuura, S., Gibbs, G.V., and Boisen, M.B., Jr. (1998) A crystal chemical stud of protoanthophyllite: orthoamphiboles with the protoamphibole structure. Physics and Chemistry of Minerals: 25: 366-377.
Konishi, H., T.L. Groy, I. Dodony, R. Miyawaki, S. Matsubara and P.R. Buseck (2003): "Crystal structure of protoanthophyllite: a new mineral from the Takase ultramafic complex, Japan" - American Mineralogist: 87: 1096-1103.
Konishi, H. et al. (2003): American Mineralogist: 88: 1718-1723.
Hawthorne, Frank C., and Roberta Oberti (2006), On the classification of amphiboles: Canadian Mineralogist:
44(1): 1-21.
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Internet Links for Protoanthophyllite |
| Search Engines: |
Look for Protoanthophyllite on Google
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| External Links: | Look for Protoanthophyllite on WebmineralLook for Protoanthophyllite on Athena MineralogyLook for Protoanthophyllite on WikipediaLook for Protoanthophyllite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Protoanthophyllite in the Natural History Museum (London) online catalogue |
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Localities for Protoanthophyllite |