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Oxy-schorl

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About Oxy-schorlHide

Formula:
Na(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3O
Colour:
Greenish black;brownish black
Hardness:
7
Specific Gravity:
3.17 - 3.19
Crystal System:
Trigonal
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-schorlHide

Approved
Approval Year:
2011

Physical Properties of Oxy-schorlHide

Colour:
Greenish black;brownish black
Hardness:
Cleavage:
None Observed
Parting:
None observed
Density:
3.17 - 3.19 g/cm3 (Measured)    3.208 g/cm3 (Calculated)
Comment:
3.17 g/cm3 (Zlatá Idka) and 3.19 g/cm3 (Přibyslavice)

Optical Data of Oxy-schorlHide

Type:
Uniaxial (-)
RI values:
nω = 1.662 - 1.663 nε = 1.637 - 1.641
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Visible
Comments:
In plane-polarized light: O = green to bluish-green, E = pale yellowish to nearly colorless (Zlatá Idka) and O = dark grayish-green, E = pale brown (Přibyslavice)

Chemical Properties of Oxy-schorlHide

Formula:
Na(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3O

Crystallography of Oxy-schorlHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Cell Parameters:
a = 15.916(3) Å, c = 7.107(1) Å
Ratio:
a:c = 1 : 0.447
Unit Cell V:
1559.1 ų
Morphology:
Acicular crystals forming fan-shaped aggregates; subhedral, columnar Crystals arranged in thin layers or irregular clusters.
Comment:
Data given for Zlatá Idka sample. For Přibyslavice: a = 15.985(1) Å, c = 7.154(1) Å, V = 1583.1(2) Å3 .

X-Ray Powder DiffractionHide

Powder Diffraction Data:
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)

Type Occurrence of Oxy-schorlHide

General Appearance of Type Material:
Fan-shaped aggregates of greenish black acicular crystals ranging up to 2 cm in size, forming aggregates up to 3.5 cm (Zlatá Idka)
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
Geological Setting of Type Material:
Metasomatically altered metarhyolite pyroclastics (Zlatá Idka): Foliated muscovite-tourmaline orthogneiss (Přibyslavice)

Synonyms of Oxy-schorlHide

Other Language Names for Oxy-schorlHide

Spanish:Oxichorlo

Relationship of Oxy-schorl to other SpeciesHide

Other Members of this group:
AdachiiteCaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH)Trig. 3m : R3m
BosiiteNaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Chromium-draviteNa(Mg3)Cr3+6(Si6O18)(BO3)3(OH)3(OH)Trig.
Chromo-alumino-povondraiteNa(Cr3)(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
DarrellhenryiteNa(LiAl2)Al6(BO3)3Si6O18(OH)3O Trig. 3m : R3m
DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-elbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-feruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3F
Fluor-liddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-schorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-tsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-uviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Foitite(□,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OHTrig. 3m : R3m
LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
LucchesiiteCaFe2+3 Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Luinaite-(OH)Na(Fe2+)3Al6(Si6O18)(BO3)3(OH)3(OH)Mon. m : Bm
Magnesio-foitite(□,Na)(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig.
MaruyamaiteK(MgAl2)(Al5Mg)(BO3)3(Si6O18)(OH)3OTrig. 3m : R3m
OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)Trig.
Oxy-chromium-draviteNa(Cr)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
Oxy-draviteNa(MgAl2)MgAl5(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Oxy-foitite□(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m (3 2/m) : R3m
Oxy-rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3O
Oxy-uviteCaMg3Al6(Si6O18)(BO3)3(OH)3O
Oxy-vanadium-draviteNa(V)3(V4Mg2)Si6O18(BO3)3(OH)3OTrig. 3m : R3m
PovondraiteNaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3OTrig.
Rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
TsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
UM2000-64-SiO:BFeHKMgK, Mg, Fe, Si, B, O, H
Unnamed (Pb-dominant Tourmaline)(Pb,Na)(Li,Al)3Al6(Si6O18)(BO3)3(OH)3(F,OH)
Uvite SeriesCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)Trig. 3m : R3m
Vanadio-oxy-chromium-draviteNa(V)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
Vanadio-oxy-draviteNaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m

Other InformationHide

Health Risks:
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-schorlHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
Bačík, P., Cempírek, J., Uher, P., Ozdín D., Filip, J., Novák, M., Škoda, R., Breiter, K., Klementová, M., Ďud’a, R. (2013): Oxy-schorl, Na(Fe2+2Al)Al6+Si6+O18(BO3)3(OH)3O, a new mineral from Zlatá Idka, Slovak Republic and Přibyslavice, Czech Republic. American Mineralogist, 98, 485-492.

Internet Links for Oxy-schorlHide

Localities for Oxy-schorlHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada
 
  • Saskatchewan
    • Athabasca Basin
Adlakha, E.E. & Hattori, K. (2016): Paragenesis and composition of tourmaline types along the P2 fault and Mcarthur River uranium deposit, Athabasca Basin, Canada. Canadian Mineralogist, 54, 661-679.
Czech Republic (TL)
 
  • 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; Mineralogical Magazine 75, 2549-2561; Bačík, P., Cempírek, J., Uher, P., Ozdín D., Filip, J., Novák, M., Škoda, R., Breiter, K., Klementová, M., Ďud’a, R. (2013): Oxy-schorl, Na(Fe2+2Al)Al6+Si6+O18(BO3)3(OH)3O, a new mineral from Zlatá Idka, Slovak Republic and Přibyslavice, Czech Republic. American Mineralogist, 98, 485-492.
  • Vysočina Region
    • Žďár nad Sázavou District
      • Velké Meziříčí (Groß Meseritsch; Groß Meseritz)
Burianek, D. & Novak, M. (2004): Morphological and compositional evolution of tourmaline from nodular granite at Lavičky near Velké Meziříčí, 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.
Russia
 
  • Eastern-Siberian Region
    • Transbaikalia (Zabaykalye)
      • Chitinskaya Oblast'
        • Nerchinsk (Nertschinsk)
          • Aprelkovsky gold field
Volkov, A. V., Prokof’ev, V. Y., Alekseev, V. Y., Baksheev, I. A., & Sidorov, A. A. (2011, November). Ore-forming fluids and conditions of formation of gold-sulfide-quartz mineralization in the shear zone: Pogromnoe deposit (Eastern Transbaikalian region). In Doklady Earth Sciences (Vol. 441, No. 1, pp. 1492-1497). MAIK Nauka/Interperiodica.
Slovakia (TL)
 
  • 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, Mineralogical Magazine 75, 5, 2549-2561.; Bačík, P., Cempírek, J., Uher, P., Ozdín D., Filip, J., Novák, M., Škoda, R., Breiter, K., Klementová, M., Ďud’a, R. (2013): Oxy-schorl, Na(Fe2+2Al)Al6+Si6+O18(BO3)3(OH)3O, a new mineral from Zlatá Idka, Slovak Republic and Přibyslavice, Czech Republic. American Mineralogist, 98, 485-492.
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.
  • Maine
    • Androscoggin Co.
      • Poland
Roda-Robles, E., Simmons, W., Pesquera, A., Gil-Crespo, P. P., Nizamoff, J., & Torres-Ruiz, J. (2015). Tourmaline as a petrogenetic monitor of the origin and evolution of the Berry-Havey pegmatite (Maine, USA). American Mineralogist, 100(1), 95-109.
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