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Dickinsonite-(KMnNa) from
Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield County, Connecticut, USA

Locality type:Quarry
Classification
Species:Dickinsonite-(KMnNa)
Formula:{KNa}{Mn2+◻}{Ca}{Na3}{Mn132+}{Al}(PO4)12(OH)2
Chemical Analyses:
Oxide wt%:
1
P2O539,5 %
Al2O32,0 %
FeO13,3 %
MnO32,0 %
CaO2,3 %
Na2O7,8 %
K2O1,1 %
LiO0,45 %
H2O1,65 %
Total:97 %
Sample references:
SampleReference
1 - Moore, P.B., Ito, J. (1979) Alluaudites, wyllieites, arrojadites: crystal chemistry and nomenclature. Mineralogical Magazine: 43: 227-235.
Comments:Intimately associated with quartz, eosphorite, triploidite and rhodochrosite
Habit:foliated crystalline masses, almost micaceous, radiating or stellated curved laminae
Colour:oil to olive green, dark to grass-green
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Rare
Confirmation
Validity:Valid - Type Locality
References
References:Brush and Dana (1878).;
Shainin, V. (1946) The Branchville, Connecticut, Pegmatite. American Mineralogist: 31: 329-345.;
Palache, C., Berman, H., & Frondel, C. (1951) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 671, 718, 855.;
Moore, P.B., Ito, J. (1979) Alluaudites, wyllieites, arrojadites: crystal chemistry and nomenclature. Mineralogical Magazine: 43: 227-235.;
Weber, Marcelle H. and Earle C. Sullivan (1995) Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6) (November/December): 396-409.;
Daltry, V.D.C. and von Knorring, O. (1998) Type-mineralogy of Rwanda with particular reference to the Buranga pegmatite. Geologica Belgica: 1: 9-15 (referring to Moore & Ito, 1979).
Associated Minerals:
Associates:Eosphorite
Fairfieldite
Hureaulite
Lithiophilite
Natrophilite
Reddingite
Rhodochrosite
Triploidite
Associated Minerals Based on Photo Data:
Fairfieldite5 photos of Dickinsonite-(KMnNa) associated with Fairfieldite at this locality.
Triploidite4 photos of Dickinsonite-(KMnNa) associated with Triploidite at this locality.
Lithiophilite4 photos of Dickinsonite-(KMnNa) associated with Lithiophilite at this locality.
Reddingite3 photos of Dickinsonite-(KMnNa) associated with Reddingite at this locality.
Fillowite1 photo of Dickinsonite-(KMnNa) associated with Fillowite at this locality.
Data
Mineral Data:Click here to view Dickinsonite-(KMnNa) data
Locality Data:Click here to view Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield County, Connecticut, USA
Nearest other occurrences of Dickinsonite-(KMnNa)
20.7km (12.9 miles) U. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
24.0km (14.9 miles) Brookfield, Fairfield County, Connecticut, USA
79.3km (49.3 miles) Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
 
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