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Biotite from
Coatesville pegmatite locality, Coatesville, Chester County, Pennsylvania, USA


Locality type:Pegmatite
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Coatesville pegmatite locality, Coatesville, Chester County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:360058
Long-form Identifier:1:3:360058:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
21.4km (13.3 miles) ⓘGrace Mine, Morgantown, Berks County, Pennsylvania, USA
21.6km (13.4 miles) ⓘBenjamin Franklin Mine, Chester Springs, West Pikeland Township, Chester County, Pennsylvania, USA
22.2km (13.8 miles) ⓘGap Mine, Bart Township, Lancaster County, Pennsylvania, USA
24.1km (15.0 miles) ⓘFrench Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
28.3km (17.6 miles) ⓘWooddale Quarries, Wooddale, New Castle County, Delaware, USA
28.4km (17.6 miles) ⓘHoopes Dam, New Castle County, Delaware, USA
33.4km (20.7 miles) ⓘGoat Hill Barrens, West Nottingham Township, Chester County, Pennsylvania, USA
33.4km (20.8 miles) ⓘBrandywine Quarry (Hubbard Quarry), Wilmington, New Castle County, Delaware, USA
39.5km (24.5 miles) ⓘRawlinsville, Martic Township, Lancaster County, Pennsylvania, USA
39.6km (24.6 miles) ⓘDeshong's Quarry, Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
References
Lapham, Davis M., Geyer, Alan R., Geyer, Alan R., Smith II, Robert C., Barnes, John H. (1976) Mineral Collecting in Pennsylvania. Bulletin G33 (4th ed.). Pennsylvania Geological Survey pp.73-75
 
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