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Cobaltneustädtelite

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Formula:
Bi2Fe3+(Co,Fe3+)(AsO4)2(O,OH)4
Colour:
brown, red-brown
Lustre:
Adamantine
Hardness:
Specific Gravity:
5.81 (Calculated)
Crystal System:
Triclinic
Name:
In allusion to its composition, containing dominant cobalt, and its relationship to Neustädtelite.
The Co2+ analogue of Medenbachite.


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Classification of CobaltneustädteliteHide

Approved
Approval Year:
2000
8.BK.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
K : With medium-sized and large cations, (OH, etc.):RO4 = 2:1, 2.5:1

Physical Properties of CobaltneustädteliteHide

Adamantine
Transparency:
Transparent, Translucent
Colour:
brown, red-brown
Streak:
light brown
Hardness:
4½ on Mohs scale
Cleavage:
Distinct/Good
on {001}
Density:
5.81 g/cm3 (Calculated)

Optical Data of CobaltneustädteliteHide

Type:
Biaxial (-)
RI values:
nα = 2.020 nβ = 2.090 nγ = 2.120
Max Birefringence:
δ = 0.100
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
relatively weak

Chemical Properties of CobaltneustädteliteHide

Formula:
Bi2Fe3+(Co,Fe3+)(AsO4)2(O,OH)4

Crystallography of CobaltneustädteliteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 9.156 Å, b = 6.148 Å, c = 9.338 Å
α = 83.24°, β = 70.56°, γ = 86.91°
Ratio:
a:b:c = 1.489 : 1 : 1.519
Unit Cell V:
492.172 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.757 (50)
3.752 (100)
3.552 (50)
3.507 (40)
2.901 (100)
2.750 (40)
2.667 (70)

Type Occurrence of CobaltneustädteliteHide

Synonyms of CobaltneustädteliteHide

Other Language Names for CobaltneustädteliteHide

Related Minerals - Nickel-Strunz GroupingHide

8.BK.05BrazilianiteNaAl3(PO4)2(OH)4Mon. 2/m : P2/b
8.BK.10MedenbachiteBi2Fe3+Cu2+(AsO4)2O(OH)3Tric. 1 : P1
8.BK.10NeustädteliteBi2Fe3+(Fe3+,Co)(AsO4)2(O,OH)4Tric. 1 : P1
8.BK.15CuretoniteBa(Al,Ti)(PO4)(OH,O)FMon. 2/m
8.BK.20HeyitePb5Fe2+2(VO4)2O4Mon.
8.BK.25JamesitePb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10Tric.
8.BK.25LulzaciteSr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10Tric. 1 : P1

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 CobaltneustädteliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Krause, W., Bernhardt, H.-J., McCammon, C. and Effenberger, H. (2002): Neustädtelite and cobaltneustädtelite, the Fe3+- and Co2+- analogues of medenbachite. American Mineralogist 87, 726-738.

Internet Links for CobaltneustädteliteHide

Localities for CobaltneustädteliteHide

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.
Germany (TL)
 
  • Saxony
    • Erzgebirge
      • Schneeberg District
        • Neustädtel
W. Krause, H.-J. Bernhardt, C. McCammon & H. Effenberger (2002): Neustädtelite and cobaltneustädtelite, the Fe3+- and Co2+- analogues of medenbachite.- American Mineralogist 87, 726 - 738
Am. Min. 87:726-738
Lapis 30(7/8):68-69 (2005)
Lapis 30(7/8):68-69 (2005)
        • Wolfgang Maaßen Mine field
Am. Min. 87:726-738
Spain
 
  • Andalusia
    • Córdoba
      • Villanueva de Córdoba
Schnorrer, G. & Kronz, A. (2005): Cobaltneustädtelit, Metatorbernit, Churchit und Plumbogummit, vier von der ehemaligen Grube Espuela de San Miguel bei Villanueva de Cordoba, Prov. Cordoba in Spanien. Der Aufschluss, 56, 177-182. (in German)
Mineral and/or Locality  
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