| Locality type: | Open-Cast Mine |
| Classification |
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| Species: | Robertsite |
| Formula: | Ca2Mn33+(PO4)3O2 · 3H2O |
| Confirmation |
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| Validity: | Valid - Type Locality |
| Associated Minerals Based on Photo Data: |
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|
| Montgomeryite | 29 |
| Whitlockite | 27 |
| Leucophosphite | 13 |
| Collinsite | 13 |
| Englishite | 9 |
| Roscherite | 8 |
| Hureaulite | 6 |
| Mitridatite | 6 |
| Tinsleyite | 6 |
| Albite | 3 |
| Segelerite | 3 |
| Bermanite | 3 |
| Tiptopite | 3 |
| Hurlbutite | 2 |
| Rockbridgeite | 2 |
| Fairfieldite | 2 |
| Laueite | 2 |
| Jahnsite Subgroup | 2 |
| Strunzite | 2 |
| Kidwellite | 2 |
| Frondelite | 2 |
| Jahnsite-(CaMnFe) | 1 |
| Heterosite | 1 |
| Jahnsite Group | 1 |
| Whiteite-(CaMnMg) | 1 |
| Jahnsite-(CaMnMg) | 1 |
| Fransoletite | 1 |
| Hydroxylapatite | 1 |
| Parafransoletite | 1 |
| Data |
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| Mineral Data: | Click here to view Robertsite data |
| Locality Data: | Click here to view Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA |
| Photo Gallery | View Gallery (25 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 44218 |
| Long-form Identifier: | 1:3:44218:1 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Robertsite |
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| 9.6km (6.0 miles) | ⓘWhite Elephant Mine, Cicero Peak, Pringle, Custer Mining District, Custer County, South Dakota, USA |
| 10.6km (6.6 miles) | ⓘLinwood Mine (Phenakite Prospect), Custer, Custer Mining District, Custer County, South Dakota, USA |
| 28.4km (17.7 miles) | ⓘBig Chief Mine, Glendale, Keystone Mining District, Pennington County, South Dakota, USA |
| References |
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Moore, Paul Brian, Ito, J. (1974) I. Jahnsite, segelerite, and robertsite, three new transition metal phosphate species. II. Redefinition of overite, an isotype of segelerite. III. Isotypy of robertsite, mitridatite, and arseniosiderite. American Mineralogist, 59 (1-2) 48-59 |
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Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA