| 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 Gold Medal Group (Golden Summit Group), Hill City Mining District, Pennington County, South Dakota, USA |
| Data Identifiers |
|---|
|
| Mindat Occurrence Record ID: | 383834 |
| Long-form Identifier: | 1:3:383834:1 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Biotite |
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| 3.8km (2.3 miles) | ⓘHill City Mining District, Pennington County, South Dakota, USA |
| 5.4km (3.3 miles) | ⓘReinbold Claim (Tungsten No. 1-3 Claims), Hill City Mining District, Pennington County, South Dakota, USA |
| 5.7km (3.5 miles) | ⓘU.S. highways 16/385 & State route 87 intersection area, Oreville Mining District, Pennington County, South Dakota, USA |
| 5.7km (3.5 miles) | ⓘBlack Elk Peak (Harney Peak), Pennington County, South Dakota, USA |
| 7.5km (4.7 miles) | ⓘTin Queen Mine (White Blowout Mine), Hill City Mining District, Pennington County, South Dakota, USA |
| 7.8km (4.8 miles) | ⓘDan Patch Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA |
| 8.3km (5.1 miles) | ⓘLake Mica Prospect (Lakeside), Unorganized mining district [1], Custer County, South Dakota, USA |
| 9.1km (5.7 miles) | ⓘOreville, Custer County, South Dakota, USA |
| 9.1km (5.7 miles) | ⓘEgyptian Group, Keystone Gold Mining District, Pennington County, South Dakota, USA |
| 9.6km (6.0 miles) | ⓘPeerless Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA |
| References |
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