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Magnesiostaurolite

A valid IMA mineral species
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About MagnesiostauroliteHide

Formula:
Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
Colour:
Colorless, light cloudy gray, tan
Lustre:
Vitreous, Sub-Vitreous
Hardness:
7 - 7½
Specific Gravity:
3.54 (Calculated)
Crystal System:
Monoclinic
Name:
Named in 2003 by C. Chopin, B. Goffe, L. Ungaretti, and R. Oberti allusion to its chemical composition with dominant magnesium, and its relationship to staurolite.
Isostructural with:

Unique IdentifiersHide

Mindat ID:
2479
Long-form identifier:
mindat:1:1:2479:8
GUID
(UUID V4):
83a065ba-7772-4cd4-ac15-be1c9339cd32

IMA Classification of MagnesiostauroliteHide

Classification of MagnesiostauroliteHide

9.AF.30

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
Dana 7th ed.:
52.2.3.2

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
MstIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
MstWhitney & Evans (2010)Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371

Physical Properties of MagnesiostauroliteHide

Vitreous, Sub-Vitreous
Transparency:
Transparent, Translucent
Colour:
Colorless, light cloudy gray, tan
Streak:
White
Hardness:
7 - 7½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
{010}
Fracture:
Irregular/Uneven
Density:
3.54 g/cm3 (Calculated)

Chemistry of MagnesiostauroliteHide

Mindat Formula:
Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4

Crystallography of MagnesiostauroliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 7.871 Å, b = 16.541 Å, c = 5.632 Å
Ratio:
a:b:c = 0.476 : 1 : 0.34
Unit Cell V:
733.3 ų
Z:
1
Morphology:
Stout blades, rarely elongated.
Twinning:
Sometimes tweed texture.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0006961MagnesiostauroliteChopin C, Goffe B, Ungaretti L, Oberti R (2003) Magnesiostaurolite and zincostaurolite: mineral description with a petrogenetic and crystal-chemical update European Journal of Mineralogy 15 167-17620030293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
1.968 Å(100)
1.391 Å(82)
2.390 Å(50)
2.678 Å(38)
2.370 Å(33)
4.139 Å(24)
2.356 Å(24)
Comments:
Calculated

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 5: Initiation of plate tectonics<3.5-2.5
39 : High-𝑃 metamorphism (blueschist, eclogite, ultrahigh 𝑃 facies)

Type Occurrence of MagnesiostauroliteHide

General Appearance of Type Material:
Rare anhedral isolated grains with size ranging from a few tens to 250 μm.
Place of Conservation of Type Material:
School of Mines, Paris, France, no. 56244.
Geological Setting of Type Material:
Occurs together with talc, clinochlore and kyanite (or alone, armouring corundum) as inclusions in pyrope megablasts from the ultra-high-pressure metamorphic terrane of the Dora-Maira massif, Italian Western Alps.
Associated Minerals at Type Locality:
Reference:
Chopin, C., Goffé, B., Ungaretti, L., and Oberti, R. (2003) Magnesiostaurolite and zincostaurolite; mineral description with a petrogenetic and crystal-chemical update. European Journal of Mineralogy, 15, 167-176.

Synonyms of MagnesiostauroliteHide

Other Language Names for MagnesiostauroliteHide

Relationship of Magnesiostaurolite to other SpeciesHide

Other Members of this group:
StauroliteFe2+2Al9Si4O23(OH)Mon. 2/m : B2/m
ZincostauroliteZn2Al9Si4O23(OH)Mon. 2/m : B2/m

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Magnesiostaurolite associated with EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
3 photos of Magnesiostaurolite associated with RutileTiO2
2 photos of Magnesiostaurolite associated with PyropeMg3Al2(SiO4)3
2 photos of Magnesiostaurolite associated with Phosphoellenbergerite(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
2 photos of Magnesiostaurolite associated with Goethiteα-Fe3+O(OH)
1 photo of Magnesiostaurolite associated with PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
1 photo of Magnesiostaurolite associated with CoesiteSiO2

Related Minerals - Strunz-mindat GroupingHide

9.AF.ChegemiteCa7(SiO4)3(OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.BarwooditeMn2+6Nb5+(SiO4)2O3(OH)3Trig. 3 : P3
9.AF.Jingwenite-(Y)YAlV4+(SiO4)O2(OH)2Mon. 2/m
9.AF.05SillimaniteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m)
9.AF.05XenoliteAl10Si8O31
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.20KrieseliteAl2(GeO4)F2Orth. 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.30StauroliteFe2+2Al9Si4O23(OH)Mon. 2/m : B2/m
9.AF.30ZincostauroliteZn2Al9Si4O23(OH)Mon. 2/m : B2/m
9.AF.35TopazAl2(SiO4)(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.40NorbergiteMg3(SiO4)F2Orth. mmm (2/m 2/m 2/m)
9.AF.45AlleghanyiteMn2+5(SiO4)2(OH)2Mon. 2/m : P21/b
9.AF.45ChondroditeMg5(SiO4)2F2Mon. 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.50HumiteMg7(SiO4)3F2Orth. mmm (2/m 2/m 2/m) : Pnma
9.AF.50Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.50Unnamed (Ca-analogue of Humite)Ca7(SiO4)4F2Orth. mmm (2/m 2/m 2/m)
9.AF.50FluorchegemiteCa7(SiO4)3F2 Orth. mmm (2/m 2/m 2/m)
9.AF.50Unnamed (OH-analogue of humite)Mg7(SiO4)3(OH)2Orth.
9.AF.55ClinohumiteMg9(SiO4)4F2Mon. 2/m : P21/b
9.AF.55SonoliteMn2+9(SiO4)4(OH)2Mon. 2/m : P21/b
9.AF.55HydroxylclinohumiteMg9(SiO4)4(OH)2Mon. 2/m : P21/b
9.AF.60LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b
9.AF.65RibbeiteMn2+5(SiO4)2(OH)2Orth. mmm (2/m 2/m 2/m)
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)6Trig. 3 : P3
9.AF.75ÖrebroiteMn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3Trig. 3 : P3
9.AF.75WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3
9.AF.75ScorticoiteMn6(Sb,◻)Σ2(SiO4)2O3(OH)3Trig. 3 : P3
9.AF.80EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10Hex. 6 : P63
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
9.AF.95Pilawite-(Y)Ca2Y2Al4(SiO4)4O2(OH)2Mon. 2/m : P21/b

Fluorescence of MagnesiostauroliteHide

Creamy-yellow in shortwave, somewhat dull orange in longwave 350 nm.

Other InformationHide

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

Internet Links for MagnesiostauroliteHide

References for MagnesiostauroliteHide

Localities for MagnesiostauroliteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
China
 
  • Jiangsu
    • Lianyungang
      • Donghai Co.
        • Zhimafang
Zhang et al. (2004)
Italy (TL)
 
  • Piedmont
    • Cuneo Province
      • Brossasco
Terra Nova +2 other references
Piccoli et al. (2007)
      • Martiniana Po
Piccoli et al. (2007)
      • Venasca
Paolo Bozio data
New Zealand
 
  • Southland Region
    • Southland District
      • Fiordland National Park
C. M. Ward (1984)
Norway
 
  • Troms og Finnmark
    • Tromsø
Janák et al. (2015)
Slovenia
 
Janák et al. (2015)
 
矿物 and/or 产地  
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