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Schorl-Dravite Series

Big Photo

Reese Farm (Dale Bush Farm), Gouverneur, St Lawrence Co., New York, USA
© 2002 John H. Betts

System:Trigonal
A series between Schorl and Dravite
Series Formula:
[Na][Fe
2+
3
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
-
[Na][Mg
 
3
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]

Classification of Schorl-Dravite Series

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Crystallography of Schorl-Dravite Series

Crystal System:Trigonal

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Schorl-Dravite Series

Reference List:Povondra, P. (1981) The crystal chemistry of tourmalines of the schorl-dravite series. Acta Universitatis Carolinae Geologica 3: 223-264.

Povondra, P. and Cech, F. (1985) Lattice parameters of tourmalines of the dravite-schorl series and their relation to chemical composition. Acta Universitatis Carolinae Geologica 1985 (3): 235-245.

Bloodaxe, E.S., J.M. Hughes, M.D. Dyar, E.S. Grew, and C.V. Guidotti (1999), Linking structure and chemistry in the schorl-dravite series: American Mineralogist: 84: 922-928.

Internet Links for Schorl-Dravite Series

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    Localities for Schorl-Dravite Series

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    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Greece
     
    • Crete (Kriti) Department
      • Crete (Kriti) Island
        • Lasithi Prefecture
          • Sitía
    		Eur. J. Mineral. , 1992, 4, pp. 487-507.
    • Macedonia Department
      • Thessaloníki (Salonica) Prefecture
        • Polydentri - Kolchiko area
          • Vertiskos Mt
    		K. Michailidis et al. , Eur. J. Mineral. , 1996, 8, pp. 393-404.
    Italy
     
    • Tuscany
      • Lucca Province
        • Apuan Alps
          • Stazzema
    		Eur. J. Mineral. , 1991, 3, pp. 537-548.
    Switzerland
     
    • Wallis (Valais)
      • Binn Valley
        • Kriegalp Valley (Chriegalp Valley)
    Thailand
     
    • Pathum Thani Province
    		Eur. J. Mineral. , 1993, 5, pp. 721-736.
    USA
     
    • California
      • Riverside Co.
        • Cahuilla District
          • Little Cahuilla Mountain
    		Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
    • Colorado
      • Jefferson Co.
    		Minerals of Colorado (1997) E.B. Eckels
    Minerals of Colorado (1997) E.B. Eckels
      • Larimer Co.
        • Crystal Mountain Pegmatite District (Storm Mountain District)
    		Minerals of Colorado (1997) E.B. Eckels
    Mineral and/or Locality
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