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Zincostaurolite

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Formula:
Zn2Al9Si4O23(OH)
Zn may be replaced by Li, Fe2+, Mg.
Colour:
Colourless
Lustre:
Vitreous, Resinous
Specific Gravity:
3.78 (Calculated)
Crystal System:
Monoclinic
Name:
Named as the zinc analogue of Staurolite. Submitted to the CNMMN in 1992, but was first formally described as a new mineral species in 2003.
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Classification of ZincostauroliteHide

Approved
Approval Year:
1992
9.AF.30

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination

Physical Properties of ZincostauroliteHide

Vitreous, Resinous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Density:
3.78 g/cm3 (Calculated)

Optical Data of ZincostauroliteHide

Type:
Biaxial (+)
RI values:
nα = 1.722 nγ = 1.734
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic

Chemical Properties of ZincostauroliteHide

Formula:
Zn2Al9Si4O23(OH)

Zn may be replaced by Li, Fe2+, Mg.

Crystallography of ZincostauroliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 7.853 Å, b = 16.534 Å, c = 5.639 Å
β = 90(5)°
Ratio:
a:b:c = 0.475 : 1 : 0.341
Unit Cell V:
732.18 ų (Calculated from Unit Cell)

Type Occurrence of ZincostauroliteHide

Geological Setting of Type Material:
A karst-filling metabauxite pocket of Mesozoic cover (Barrhorn series) of the Sivie-Mischabel nappe. A breakdown of Gahnite, Pyrophyllite and Diaspore.
Associated Minerals at Type Locality:

Synonyms of ZincostauroliteHide

Other Language Names for ZincostauroliteHide

Relationship of Zincostaurolite to other SpeciesHide

Other Members of this group:
MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4Mon. 2/m : B2/m
StauroliteFe2+2Al9Si4O23(OH)Mon. 2/m : B2/m

Related Minerals - Nickel-Strunz GroupingHide

9.AF.BarwooditeMn2+6Nb5+(SiO4)2O3(OH)3Trig. 3 : P3
9.AF.05SillimaniteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m)
9.AF.10AndalusiteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
9.AF.10KanonaiteMn3+Al(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
9.AF.15KyaniteAl2(SiO4)OTric. 1 : P1
9.AF.20MulliteAl4+2xSi2-2xO10-xOrth. mmm (2/m 2/m 2/m) : Pbam
9.AF.20Krieselite(Al,Ga)2(GeO4)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
9.AF.23BoromulliteAl9BSi2O19Orth. mm2 : Cmc21
9.AF.25YoderiteMg(Al,Fe3+)3(SiO4)2O(OH)Mon. 2/m : P21/m
9.AF.30MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4Mon. 2/m : B2/m
9.AF.30StauroliteFe2+2Al9Si4O23(OH)Mon. 2/m : B2/m
9.AF.35TopazAl2(SiO4)(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.40NorbergiteMg3(SiO4)(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.45AlleghanyiteMn2+5(SiO4)2(OH)2Mon. 2/m : P21/b
9.AF.45Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2Mon. 2/m : P21/b
9.AF.45ReinhardbraunsiteCa5(SiO4)2(OH,F)2Mon. 2/m : P21/b
9.AF.45KumtyubeiteCa5(SiO4)2F2Mon. 2/m : P21/b
9.AF.45HydroxylchondroditeMg5(SiO4)2(OH)2Mon. 2/m : P21/b
9.AF.50Humite(Mg,Fe2+)7(SiO4)3(F,OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
9.AF.50Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2Orth.
9.AF.50Unnamed (Ca-analogue of Humite)Ca7(SiO4)4F2Orth. mmm (2/m 2/m 2/m)
9.AF.55ClinohumiteMg9(SiO4)4F2Mon. 2/m : P21/b
9.AF.55SonoliteMn2+9(SiO4)4(OH)2Mon.
9.AF.55HydroxylclinohumiteMg9(SiO4)4(OH)2Mon. 2/m
9.AF.60LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b
9.AF.65RibbeiteMn2+5(SiO4)2(OH)2Orth.
9.AF.70JerrygibbsiteMn2+9(SiO4)4(OH)2Orth. mmm (2/m 2/m 2/m) : Pbcn
9.AF.75FranciscaniteMn2+6(V5+,☐)2(SiO4)2(O,OH)6Hex.
9.AF.75ÖrebroiteMn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3Hex.
9.AF.75WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3
9.AF.80EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10Hex.
9.AF.85Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2Mon. 2/m : B2/b
9.AF.85MagnesiochloritoidMgAl2(SiO4)O(OH)2Mon. 2/m : B2/b
9.AF.85Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2Mon.
9.AF.90PoldervaartiteCaCa[SiO3(OH)](OH)Orth. mmm (2/m 2/m 2/m) : Pbca
9.AF.90OlmiiteCaMn2+[SiO3(OH)](OH)Orth. mmm (2/m 2/m 2/m) : Pbca

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 ZincostauroliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chopin C., Goffé B., Ungaretti L., Oberti R. (2003) Magnesiostaurolite and zincostaurolite: mineral description with a petrogenetic and crystal-chemical update. European Journal of Mineralogy: 15: 167-176.
Feenstra A., Okcenga E., Rhede D., Wiedenbeck M. (2003) Li-rich zincostaurolite and its decompression-related breakdown products in a diaspore-bearing metabauxite from East Samos (Greece): An EMP and SIMS study. American Mineralogist: 88: 789-805.
Roth, Ph. (2007): Minerals first discovered in Switzerland and minerals named after Swiss individuals. Philippe Roth, Ed., Zurich, 239 pp.

Internet Links for ZincostauroliteHide

Localities for ZincostauroliteHide

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.
Greece
 
  • North Aegean
    • Samos
American Mineralogist (2003) 88, 789-805
Norway
 
  • Nordland
    • Hemnes
      • Bleikvasslia
Rosenberg, J.L., Spry, P.G., Jacobson, C.E., and Vokes, F.M. (2000): The effects of sulfidation and oxidation during metamorphism on compositionally varied rocks adjacent to the Bleikvassli Zn-Pb-(Cu) deposit, Nordland, Norway. Mineralium Deposita 35, 714-726
Russia
 
  • Komi Republic
    • Kozhim River Basin
      • Maldynyrd range (Maldy-nyrd range)
P.M. Kartashov data
        • Grubependity Lake
Pavel M. Kartashov data
Switzerland (TL)
 
  • Valais
    • Leuk
      • Turtmann-Unterems
        • Turtmann Valley
Chopin, C., Goffé, B., Ungaretti, L., Oberti, R. (2003): Magnesiostaurolite and zincostaurolite: mineral description with a petrogenic and crystal-chemical update. Eur. J. Mineral., 15, 167-176
    • Zermatt - Saas Fee area
      • Matt Valley
Am Min 88:5-6 pp 789-805
 
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