| Locality type: | Quarry |
| Classification |
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| Species: | Ferro-ferri-obertiite |
| Formula: | NaNa2(Fe32+Fe3+Ti)Si8O22O2 |
| Comments: | A specimen tested via quantitative EDS and IR by Nikita Chukanov corresponds with a ferro-ferri-obertiite composition. Fe<sup>3+</sup>/Fe<sup>2+</sup> ratio was determined via charge balance and IR spectrum show absence of (OH). |
| Confirmation |
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| Validity: | Unconfirmed/Questioned |
| Data |
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| Mineral Data: | Click here to view Ferro-ferri-obertiite data |
| Locality Data: | Click here to view Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 921721 |
| Long-form Identifier: | 1:3:921721:8 |
| GUID (UUID V4): | bd7dccc6-ba11-4e9b-8e18-42984212634a |
| References |
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| Reference Search (possible matching items) |
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 | Oberti, Roberta, Boiocchi, Massimo, Hawthorne, Frank C., Ball, Neil A., Blass, Günter (2017) Ferri-obertiite from the Rothenberg quarry, Eifel volcanic complex, Germany: mineral data and crystal chemistry of a new amphibole end-member. Mineralogical Magazine, 81 (3) 641-651 doi:10.1180/minmag.2016.080.117 | Journal (article/letter/editorial) | | pp. 641–651 Ferri-obertiite from the Rothenberg quarry, Eifel volcanic complex, Germany: mineral data...Merzbachstrasse 6, 52246 Eschweiler-St-Joris, Germany [Received 24 November 2015; Accepted 11 May 2016;...Pink-orange crystals of a composition within the ferri-obertiite compositional space were found in vesicles...vein found from a basalt quarry at Mount Rothenberg, Eifel district, Germany. Associated minerals are... eifelite (the second occurrence after the Caspar quarry at Bellerberg volcano, Eifel region), tridymite |
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