Classification of Rondorfite |
| IMA status: | Approved 1997 |
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| Strunz 8th edition ID: | 8/B.05-05
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| Nickel-Strunz 10th (pending) edition ID: | 9.AB.20
9 : SILICATES (Germanates) A : Nesosilicates B : Nesosilicates without additional anions; cations in [4] and greater coordination |
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Type Occurrence of Rondorfite |
| Type Locality: | Ettringer Bellerberg Mt., Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany |
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| General Appearance of Type Material: | minute grains to 0.5 mm |
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| Year of Discovery: | 1979 |
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| Geological Setting of type material: | thermally altered calcium-rich xenolites in rocks contacting leucite-rich lava slags |
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| Associated Minerals at type locality: | |
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Physical Properties of Rondorfite |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Translucent |
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| Colour: | orange brown to amber |
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| Streak: | pale yellow |
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| Tenacity: | Brittle |
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| Cleavage: | None Observed |
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| Fracture: | Conchoidal |
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| Density (measured): | 3.03 g/cm3 |
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Crystallography of Rondorfite |
| Crystal System: | Isometric |
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| Class (H-M): | m3 (2/m 3) - Diploidal |
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| Cell Parameters: | a = 15.08Å
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| Unit Cell Volume: | V 3,429.29 ų (Calculated from Unit Cell) |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 2.90 | | (40) | | 2.66 | | (100) |
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Chemical Properties of Rondorfite |
| Formula: | |
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| All elements listed in formula: | Ca, Cl, Mg, O, Si |
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Relationship of Rondorfite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Rondorfite |
| Synonyms: | |
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| 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 Rondorfite |
| Reference List: | Mihajlović, T., C. L. Lengauer, T. Ntaflos, U. Kolitsch and E. Tillmanns (2004): Two new minerals rondorfite, Ca8Mg[SiO4]4Cl2, and almarudite, K(ٱ,Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30], and a study of iron-rich wadalite, Ca12[(Al8Si4Fe2)O32]Cl6, from the Bellerberg (Bellberg) volcano, Eifel, Germany. Neues Jahrbuch für Mineralogie, Abhandlungen: 179: 265-294.
Rastsvetaeva, R.K., A. E. Zadov, N.V. Chukanov (2008) Crystal structure of low-symmetry rondorfite. Kristallografiya, 2008, Vol. 53, No. 2, pp. 226–232. |
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Articles/Blogs about Rondorfite |
Internet Links for Rondorfite |
| Search Engines: |
Look for Rondorfite on Google
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| External Links: | Look for Rondorfite on WebmineralLook for Rondorfite on Athena MineralogyLook for Rondorfite on WikipediaLook for Rondorfite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Rondorfite in the Natural History Museum (London) online catalogue |
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Localities for Rondorfite |
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