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Alleghanyite from
Benallt Mine, Rhiw, Aberdaron, Gwynedd, Wales, UK


Locality type:Mine
Classification
Species:Alleghanyite
Formula:Mn52+(SiO4)2(OH)2
Comments:Alleghanyite was found as individual crystals or, more commonly, composite crystals with tephroite. The composite alleghanyite/tephroite crystals are up to 2 cm in length and vary in thickness from 2 mm to microscopic size. The alleghanyite contains up to 4.8 wt% Ti.
Habit:blade-like
Colour:clove-brown
Quality for species:Excellent - world class for species or very significant. (!!)
Abundance at site:Very Rare
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Tephroite
Data
Mineral Data:Click here to view Alleghanyite data
Locality Data:Click here to view Benallt Mine, Rhiw, Aberdaron, Gwynedd, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:395
Long-form Identifier:1:3:395:5
GUID (UUID V4):0
Nearest other occurrences of Alleghanyite
43.8km (27.2 miles) ⓘLlyn du Bach mine, Llanfair, Gwynedd, Wales, UK
References
Bevins, Richard E. (1994) A Mineralogy of Wales - Geological Series No. 16. National Museum of Wales. 146pp.
Liferovich, R. P., Mitchell, R. H., Zozulya, D. R., Shpachenko, A. K. (2006) Paragenesis and composition of banalsite, stronalsite, and their solid solution in nepheline syenite and ultramafic alkaline rocks. The Canadian Mineralogist, 44 (4) 929-942 doi:10.2113/gscanmin.44.4.929
 
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