Dickinsonite-(KMnNa) from
Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield County, Connecticut, USA
| Locality type: | Quarry | |||||||||||||||||||||||
| Classification | ||||||||||||||||||||||||
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| Species: | Dickinsonite-(KMnNa) | |||||||||||||||||||||||
| Formula: | {KNa}{Mn2+◻}{Ca}{Na3}{Mn132+}{Al}(PO4)12(OH)2 | |||||||||||||||||||||||
| Chemical Analyses: | ||||||||||||||||||||||||
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| 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: | ||||||||||||||||||||||||
| Fairfieldite | ⓘ5 photos of Dickinsonite-(KMnNa) associated with Fairfieldite at this locality. | |||||||||||||||||||||||
| Triploidite | ⓘ4 photos of Dickinsonite-(KMnNa) associated with Triploidite at this locality. | |||||||||||||||||||||||
| Lithiophilite | ⓘ4 photos of Dickinsonite-(KMnNa) associated with Lithiophilite at this locality. | |||||||||||||||||||||||
| Reddingite | ⓘ3 photos of Dickinsonite-(KMnNa) associated with Reddingite at this locality. | |||||||||||||||||||||||
| Fillowite | ⓘ1 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 | |||||||||||||||||||||||
Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA