Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Langite from
Silver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK


02386700017272355407999.jpg
Langite, etc.

Silver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
04242450017409201242329.jpg
Langite, etc.

Silver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
08150610017271986873459.jpg
Langite, etc.

Silver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
04242450017409201242329.jpg
Langite, etc.

Silver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
08150610017271986873459.jpg
Langite, etc.

Silver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
03724340017429007031546.jpg
Langite, etc.

Silver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
Classification
Species:Langite
Formula:Cu4(SO4)(OH)6 · 2H2O
Comments:Cooper & Stanley (1990): "Locally common as pseudo-hexagonal crystals to 0.25mm on altered sulphides from an old ore pile at [NY29952415]. Probably dump-formed (det. Leeds Univ.: XRD, D.I. Green, pers. comm.)."
Habit:pseudohexagonal
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Associated Minerals Based on Photo Data:
Linarite3
Leadhillite2
Quartz2
Hemimorphite1
Chalcopyrite1
Galena1
Schulenbergite1
Susannite1
Data
Mineral Data:Click here to view Langite data
Locality Data:Click here to view Silver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:6794
Long-form Identifier:1:3:6794:2
GUID (UUID V4):0
Nearest other occurrences of Langite
0.4km (0.3 miles) ⓘRoughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.7km (0.5 miles) ⓘMexico Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.7km (0.5 miles) ⓘRed Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.5km (1.0 miles) ⓘBrae Fell Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
3.1km (2.0 miles) ⓘDriggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
3.5km (2.2 miles) ⓘOld Sandbed Mine, Caldbeck, Allerdale, Cumbria, England, UK
3.6km (2.2 miles) ⓘPotts Gill Copper Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK
6.4km (4.0 miles) ⓘSaddleback Old Mine, Mungrisdale, Eden, Cumbria, England, UK
6.9km (4.3 miles) ⓘBrundholme Mine (Glenderaterra Mine; Blencathra Mine), Glenderaterra Valley, Threlkeld, Eden, Cumbria, England, UK
14.6km (9.1 miles) ⓘStoneycroft Smelter slag locality, Above Derwent, Allerdale, Cumbria, England, UK
References
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
 
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