Cornwallite from
Low Pike north slopes, Caldbeck, Allerdale, Cumbria, England, UK
| Classification | ||
|---|---|---|
| Species: | Cornwallite | |
| Formula: | Cu5(AsO4)2(OH)4 | |
| Comments: | First identified by Cooper & Stanley (1990) on a few specimens collected by D.R. Middleton, cornwallite is fairly common in small amounts on dump material from an old trial on the Low Pike vein above Potts Gill [NY320358]. It forms thin, drusy, crusts of a bright turquoise colour in fractures in vein quartz with mimetite, bayldonite, philipsburgite, beudantite, and baryte (det. BM(NH): XRD). A similar, but darker green mineral has been identified as a phosphatian variety (M.P. Cooper Collection, det. University of Manchester Institute of Science and Technology (UMIST): IR). | |
| Habit: | thin, drusy crusts | |
| Colour: | bright turquoise | |
| Confirmation | ||
| Validity: | Confirmed | |
| Confirmation Methods: | XRD Infrared Spectroscopy | |
| Data | ||
| Mineral Data: | Click here to view Cornwallite data | |
| Locality Data: | Click here to view Low Pike north slopes, Caldbeck, Allerdale, Cumbria, England, UK | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 3983 | |
| Long-form Identifier: | 1:3:3983:3 | |
| GUID (UUID V4): | a5051d67-99a4-4a13-a05c-b60faa961340 | |
| Nearest other occurrences of Cornwallite | ||
| 0.7km (0.4 miles) | ⓘOld Potts Gill Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK | |
| 0.9km (0.6 miles) | ⓘOld Sandbed Mine (Old Sandbeds Mine), Caldbeck, Allerdale, Cumbria, England, UK | |
| 1.3km (0.8 miles) | ⓘPotts Gill Copper Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK | |
| 89.4km (55.5 miles) | ⓘGlengonnar shaft (Brow and Browns Veins), Mine Hill, Leadhills, South Lanarkshire, Scotland, UK | |
| References | ||
