| | Description | |
| Comments: | As a constituent of dark, unoxidized U-V ores; also in tabular bodies in sandstone-filled, paleo-stream channels or scours. Fills interstices in sandstone & conglomerate. | | Quality of samples: | not specified / average specimens | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 181; Young, R.G. (1964), Distribution of uranium deposits in the White Canyon-Monument Valley district, UT-AZ, Econ.Geol.: 59: 850-973. | | Associated minerals: | |
| Associates: | Corvusite
Doloresite
Montroseite
Uraninite
| | Data | |
| Mineral Data: | Click here to view Coffinite data | | Locality Data: | Click here to view Monument No. 2 Mine, Monument No. 2 channel, Monument Valley, Navajo Indian Reservation, Apache Co., Arizona, USA |
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