| | Description | |
| Quality of samples: | not specified / average specimens | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 62. | | Data | |
| Mineral Data: | Click here to view Clay data | | Locality Data: | Click here to view Constancia mine, Cerro Tazna, Atocha-Quechisla District, Nor Chichas Province, Potosí Department, Bolivia |
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