| Locality type: | Mine |
| Classification |
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| Species: | 'Tantalite' (not an IMA approved species) |
| Formula: | (Mn,Fe)(Ta,Nb)2O6 |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Muscovite | 1 |
| Data |
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| Mineral Data: | Click here to view Tantalite data |
| Locality Data: | Click here to view Tin Mountain Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 210795 |
| Long-form Identifier: | 1:3:210795:0 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Tantalite |
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| 4.2km (2.6 miles) | ⓘHelen Beryl Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA |
| 7.0km (4.4 miles) | ⓘDorothy Lode, Custer Mining District, Custer County, South Dakota, USA |
| 11.3km (7.0 miles) | ⓘMayo Lode, Custer Mining District, Custer County, South Dakota, USA |
| 11.5km (7.2 miles) | ⓘOld Mike mine (Great Northern; Old Mike M.S.2212), Custer, Custer Mining District, Custer County, South Dakota, USA |
| 13.6km (8.4 miles) | ⓘHigh Climb Mine, Custer, Custer Mining District, Custer County, South Dakota, USA |
| 14.6km (9.1 miles) | ⓘBull Moose Mine, Custer, Custer Mining District, Custer County, South Dakota, USA |
| 15.0km (9.3 miles) | ⓘLookout Mine (Carroll Claims; Park; Rosebud), Pringle, Custer Mining District, Custer County, South Dakota, USA |
| 19.4km (12.1 miles) | ⓘGrizzly Bear Gulch, Hill City Mining District, Pennington County, South Dakota, USA |
| 27.7km (17.2 miles) | ⓘDan Patch Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA |
| 28.2km (17.5 miles) | ⓘBob Ingersoll Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA |
| References |
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Tin Mountain Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA