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Graeserite

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About GraeseriteHide

04525980014949182654371.jpg
Stefan Graeser
Formula:
(Fe3+,Ti)4Ti3AsO13(OH)
also given as Fe2+/sup>xFe3+4-2xTi4+3+xAs3+O13(OH)
Colour:
Black
Lustre:
Metallic
Hardness:
Crystal System:
Monoclinic
Name:
Named in 1998 by M. S. Krezemnicki and E. Reusser in honor of Dr. Stefan Graeser (1935-), professor at the Mineralogical-Petrographic Institute, University of Basel, Switzerland in recognition of his extensive research on the oxides and sulfosalts of arsenic in the Binntal region of Switzerland.
The Fe3+ dominant analog of Tomichite and the As3+ dominant analog of Derbylite.

Its relation with derbylite is homeotypic; both crystallize in the same point group, but different space group.


Classification of GraeseriteHide

Approved
4.JB.55

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O

Physical Properties of GraeseriteHide

Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Black
Hardness:
5½ on Mohs scale
Fracture:
Conchoidal

Chemical Properties of GraeseriteHide

Formula:
(Fe3+,Ti)4Ti3AsO13(OH)

also given as Fe2+/sup>xFe3+4-2xTi4+3+xAs3+O13(OH)
IMA Formula:
Fe3+4Ti3As3+O13(OH)

Crystallography of GraeseriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 5.0225(7) Å, b = 14.3114(18) Å, c = 7.1743(9) Å
β = 104.878(3)°
Ratio:
a:b:c = 0.351 : 1 : 0.501
Unit Cell V:
498.39 ų
Comment:
example, Biagoni et al. (2020)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0015412GraeseriteBerlepsch P, Armbruster T (1998) The crystal structure of Pb2+-bearing graeserite, Pb0.14(Fe,Ti)7AsO12+x(OH)2-x, a mineral of the derbylite group Schweizerische Mineralogische und Petrographische Mitteilungen 78 1-91998Gorb, Binn valley, Western Alps, Switzerland0293
CIF Raw Data - click here to close

Geological EnvironmentHide

Geological Setting:
Metamorphosed Precambrian calc-silicate gneissic rock in the footwall of a Zn-Fe-Mn orebody (Sterling Hill, NJ).

Type Occurrence of GraeseriteHide

Geological Setting of Type Material:
In hydrothermal veins in a two-mica paragneiss.

Synonyms of GraeseriteHide

Other Language Names for GraeseriteHide

German:Graeserit
Spanish:Graeserita

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Graeserite associated with Fetiasite(Fe3+,Fe2+,Ti)3(As2O5)O2
3 photos of Graeserite associated with QuartzSiO2
2 photos of Graeserite associated with Chlorite Group
1 photo of Graeserite associated with CalciteCaCO3
1 photo of Graeserite associated with ClinochloreMg5Al(AlSi3O10)(OH)8
1 photo of Graeserite associated with RutileTiO2
1 photo of Graeserite associated with AdulariaKAlSi3O8
1 photo of Graeserite associated with HematiteFe2O3

Related Minerals - Nickel-Strunz GroupingHide

4.JB.05Fetiasite(Fe3+,Fe2+,Ti)3(As2O5)O2Mon.
4.JB.10ManganarsiteMn3(As2O4)(OH)4Trig.
4.JB.15MagnussoniteMn10As6O18(OH,Cl)2Iso. m3m (4/m 3 2/m) : Ia3d
4.JB.15UM1984-09-AsO:ClHMnMn10As6O18(OH)ClTet. 4/mmm (4/m 2/m 2/m) : I41/acd
4.JB.20ArmangiteMn2+26(AsO3)14(HAsO3)4(CO3)Trig. 3 : P3
4.JB.25NanlingiteNa(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14Trig.
4.JB.30AsbecasiteCa3(Ti,Sn4+)Be2(AsO3)6(SiO4)2Trig. 3m : P3c1
4.JB.35StenhuggariteCaFeSb(AsO3)2OTet.
4.JB.40TrigonitePb3Mn2+(AsO3)2(HAsO3)Mon. m
4.JB.45FinnemanitePb5(AsO3)3ClHex. 6/m : P63/m
4.JB.50GebharditePb8(As2O5)2OCl6Mon. 2/m : P21/b
4.JB.55DerbyliteFe3+4Ti3Sb3+O13(OH)Mon. 2/m : P21/m
4.JB.55Tomichite(V,Fe)4Ti3AsO13(OH)Mon. 2/m : P21/m
4.JB.60Hemloite(Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH)Tric. 1 : P1
4.JB.65FreediteCu+Pb8(AsO3)2O3Cl5Mon. 2/m : B2/m
4.JB.70GeorgiadèsitePb4(AsO3)Cl4(OH)Mon.
4.JB.75Ekatite(Fe3+,Fe2+,Zn)12(AsO3)6(AsO3,HSiO4)2(OH)6Hex.

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.
Industrial Uses:
None

References for GraeseriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Krezemnicki, M.S. and Reusser, E. (1998) Graeserite, Fe3+4Ti3As3+O13(OH) a new mineral species of the derbylite group from from the Mount Leone Nappe, Binntal Region, Western Alps, Switzerland. Canadian Mineralogist: 36: 1083-1088.
Schweizerische mineralogische und petrographische Mitteilungen: 78: 1-9.
Verbeek, E., Orosz, J., and Nikischer, T. (2006) Mineral News: 22(9): 8-9.
Biagioni, C., Bonaccorsi, E., Perchiazzi, N., Hålenius, U., Zaccarini, F. (2020): Derbylite and graeserite from the Monte Arsiccio mine (Apuan Alps, Tuscany, Italy): occurrence and crystal-chemistry. Mineralogical Magazine: 84 (in press); http://forum.amiminerals.it/viewtopic.php?f=5&t=16490&sid=896ab93854cfe605adcb73a79ca23ad4

Internet Links for GraeseriteHide

Localities for GraeseriteHide

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.
Italy
 
  • Tuscany
    • Lucca Province
      • Stazzema
        • Sant'Anna di Stazzema
Collection Lechner Alois
Switzerland (TL)
 
  • Valais
    • Goms
      • Binn
        • Lärchultini
M.S. Krzemnicki & E. Reusser (1998): Graeserite, Fe4Ti3AsO13(OH), a new mineral species of the derbylite group from the Monte Leone nappe, Binntal, Western Alps, Switzerland.- Canadian Mineralogist 36, 1083-1088.
USA
 
  • New Jersey
    • Sussex County
      • Franklin Mining District
        • Ogdensburg
          • Sterling Hill
Verbeek, E. et al (2006) Mineral News: 22(9): 8-9.
 
Mineral and/or Locality  
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