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Barwoodite from
Big Rock Quarry (3M Quarry; Arch Street Pike Quarry), Granite Mountain area, Little Rock, Pulaski Co., Arkansas, USA

Locality type:Quarry
Classification
Species:Barwoodite
Formula:Mn62+Nb5+(SiO4)2O3(OH)3
Chemical Analyses:
Empirical formulae:
1Mn+62(Nb5+0.94Fe3+0.18Mn3+0.110.772(SiO4)2[O3.58(OH)2.426
Sample references:
SampleReference
1Type SpecimenKampf, A.R., Celestian, A.J., Nash, B.P. (2018): Barwoodite, Mn6+(Nb5+,[] )2(SiO4)2(O,OH)6, a New Member of the Welinite Group from Granite Mountain, Arkansas. Canadian Mineralogist, 56: 799-809.
Confirmation
Validity:Valid - Type Locality
References
References:Kampf, A.R., Celestian, A.J. and Nash, B.P. (2017) Barwoodite, IMA 2017-046. CNMNC Newsletter No. 39, October 2017, page 1281; Mineralogical Magazine: 81: 1279–1286; Kampf, A.R., Celestian, A.J., Nash, B.P. (2018): Barwoodite, Mn6+(Nb5+,◻)2(SiO4)2(O,OH)6, a New Member of the Welinite Group from Granite Mountain, Arkansas. Canadian Mineralogist, 56, 799-809.
Data
Mineral Data:Click here to view Barwoodite data
Locality Data:Click here to view Big Rock Quarry (3M Quarry; Arch Street Pike Quarry), Granite Mountain area, Little Rock, Pulaski Co., Arkansas, USA
Nearest other occurrences of Barwoodite
4.2km (2.6 miles) Granite Mountain Quarry #1, Granite Mountain Area, Little Rock, Pulaski Co., Arkansas, USA
 
Mineral and/or Locality  
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