| Locality type: | Claim |
| Classification |
|---|
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| Species: | 'Biotite' (not an IMA approved species) |
| Formula: | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Confirmation |
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|
| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Biotite data |
| Locality Data: | Click here to view Kirka Claim (Downing Claim), Unorganized mining district [1], Custer County, South Dakota, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 382992 |
| Long-form Identifier: | 1:3:382992:9 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Biotite |
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| 3.6km (2.2 miles) | ⓘOreville, Custer County, South Dakota, USA |
| 5.4km (3.3 miles) | ⓘTin Queen Mine (White Blowout Mine), Hill City Mining District, Pennington County, South Dakota, USA |
| 7.0km (4.4 miles) | ⓘU.S. highways 16/385 & State route 87 intersection area, Oreville Mining District, Pennington County, South Dakota, USA |
| 7.4km (4.6 miles) | ⓘReinbold Claim (Tungsten No. 1-3 Claims), Hill City Mining District, Pennington County, South Dakota, USA |
| 7.7km (4.8 miles) | ⓘSunshine Mica Prospect, Custer Mining District, Custer County, South Dakota, USA |
| 7.8km (4.8 miles) | ⓘLake Mica Prospect (Lakeside), Unorganized mining district [1], Custer County, South Dakota, USA |
| 7.9km (4.9 miles) | ⓘKnowles lode claim, Custer, Custer Mining District, Custer County, South Dakota, USA |
| 8.4km (5.2 miles) | ⓘSurprise Mica Mine, Custer Mining District, Custer County, South Dakota, USA |
| 8.6km (5.4 miles) | ⓘBig Horn Lode Prospect, Custer Mining District, Custer County, South Dakota, USA |
| 9.5km (5.9 miles) | ⓘDorothy V Prospect (Van), Custer Mining District, Custer County, South Dakota, USA |
| References |
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