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Oxy-schorl

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Formula:
Na(Fe
2+
 
Al)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
System:Trigonal
Member of:Tourmaline Group
Name:For being an "oxidised" "schorl".


"Schorl" with O>OH,F on the W site; not uncommon, but can be reliably identified only from detailed and quantitative chemical analyses.

Originally used as a working name and published without approval, then finally approved in 2011.


Compare also oxy-dravite.

Classification of Oxy-schorl

IMA status:Approved 2011
mindat.org URL:http://www.mindat.org/min-40465.html
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Type Occurrence of Oxy-schorl

Type Locality:Přibyslavice, Kutná Hora (Kuttenberg), Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic
Place of Conservation of Type Material:Type material is deposited in the collections of the Department of Mineralogy and Petrography, Moravian Museum, Brno, Czech Republic, specimen numbers B10521 and B10522, the East-Slovak Museum, Natural History Division, Košice, Slovakia, specimen number G

Crystallography of Oxy-schorl

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3m
Cell Parameters:a = 15.9853(12) Å, c = 7.1538(6) Å
Ratio:a:c = 1 : 0.448
Unit Cell Volume:V 1,583.10 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
6.364 (74)
4.978 (28)
4.225 (48)
4.000 (52)
3.466 (100)
2.955 (79)
2.583 (65)
2.042 (31)

Chemical Properties of Oxy-schorl

Formula:
Na(Fe
2+
 
Al)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Essential elements:Al, B, Fe, H, Na, O, Si
All elements listed in formula:Al, B, Fe, H, Na, O, Si

Relationship of Oxy-schorl to other Species

Member of:Tourmaline Group
Other Members of Group:

- +
Chromium-dravite
Na(Mg
 
3
)Cr
3+
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Chromo-alumino-povondraite
Na(Cr
 
3
)(Al
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Darrellhenryite
Na(LiAl
 
2
)Al
 
6
(BO
 
3
)
 
3
Si
 
6
O
 
18
(OH)
 
3
O
Dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Fluor-buergerite
Na(Fe
3+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
F
Fluor-dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-tsilaisite
Na(Mn
2+
 
)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Foitite
(□,Na)(Fe
2+
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
OH
Liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Luinaite-(OH)
Na(Fe
2+
 
)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Magnesiofoitite
(□,Na)(Mg
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Olenite
Na(Al
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
(OH)
Oxy-chromium-dravite
Na(Cr)
 
3
(Cr
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-dravite
Na(MgAl
 
2
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-rossmanite
☐(LiAl
 
2
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-vanadium-dravite
Na(V)
 
3
(V
 
4
Mg
 
2
)Si
 
6
O
 
18
(BO
 
3
)
 
3
(OH)
 
3
O
Povondraite
NaFe
3+
3
(Mg
 
2
Fe
3+
4
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Rossmanite
☐(LiAl
 
2
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Tsilaisite
Na(Mn
2+
 
)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
UM2000-64-SiO:BFeHKMg
K, Mg, Fe, Si, B, O, H
Unnamed (Pb-dominant tourmaline)
(Pb,Na)(Li,Al)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(F,OH)
Uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(F/OH)
Vanadio-oxy-chromium-dravite
Na(V)
 
3
(Cr
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Vanadio-oxy-dravite
NaV
 
3
(Al
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O

Other Names for Oxy-schorl

Synonyms:
IMA2011-011
Other Languages:

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 Oxy-schorl

Reference List:

- +
Novák, M., Povondra, P. & Selway, Julie B. (2004): Schorl-oxy-schorl to dravite-oxy-dravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic. European Journal of Mineralogy 16, 323-333.

Bačík, P., Cempírek, J., Uher, P., Ozdín, D., Filip, J., Novák, M., Škoda, R., Breiter, K., Klementová, M. and Ďud’a, R. (2011) Oxy-schorl, IMA 2011-011. CNMNC Newsletter No. 10, October 2011, page 2550; Mineral. Mag. 75, 2549-2561.

Internet Links for Oxy-schorl

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  • Raman and XRD data at RRUFF project
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  • Localities for Oxy-schorl

    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.
    (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.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
        • Kutná Hora (Kuttenberg)
    Bačík, P., Cempírek, J., Uher, P., Ozdín, D., Filip, J., Novák, M., Škoda, R., Breiter, K., Klementová, M. and Ďud’a, R. (2011) Oxy-schorl, IMA 2011-011. CNMNC Newsletter No. 10, October 2011, page 2550; Mineral. Mag. 75, 2549-2561.
    • Moravia (Mähren; Maehren)
      • Vysočina Region
        • Žďár nad Sázavou
          • Velké Meziříčí
    Burianek, D. & Novak, M. (2004): Morphological and compositional evolution of tourmaline from nodular granite at Lavicky near Velke Mezirici, Moldanubicum, Czech Republic. Journal of the Czech Geological Society 49, 81-90.
    Germany
     
    • Saxony
      • Erzgebirge
        • Pockau
          • Forchheim
    Ertl, A., Marschall, H.R., Giester, G., Henry, D.J., Schertl, H.-P., Ntaflos, T., Luvizotto, G.L., Nasdala, L. & Tillmanns, E. (2010): Metamorphic ultra high-pressure tourmalines: Structure, chemistry, and correlations to PT conditions. Am. Mineral., 95, 1-10.
    Slovakia
     
    • Košice Region
      • Košice Co.
    Bačík P., Cempírek J., Uher P., Ozdín D., Filip J., Novák M., Škoda R., Breiter K., Klementová M., Ďud’a R. (2011): Oxy-schorl, IMA 2011-011. CNMNC Newsletter No. 10, Mineral. Mag. 75, 5, 2549-2561.
    USA
     
    • California
      • San Diego Co.
        • Mesa Grande District
          • Gem Hill
    Ertl, A., Rossman, G.R., Hughes, J.M., London, D., Wang, Y., O’Leary, J.A., Dyar, M.D., Prowatke, S., Ludwig, T. & Tillmanns, E. (2010): Tourmaline of the elbaite-schorl series from the Himalaya Mine, Mesa Grande, California, U.S.A.: A detailed investigation. Am. Mineral., 95, 24-40.
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