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Metakahlerite

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Formula:
Fe2+(UO2)2(AsO4)2 · 8H2O
Colour:
sulphur yellow
Hardness:
2 - 3
Crystal System:
Triclinic
Hide all sections | Show all sections

Classification of MetakahleriteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.EB.10

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
40.2a.15.2

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
20.7.18

20 : Arsenates (also arsenates with phosphate, but without other anions)
7 : Arsenates of U

Physical Properties of MetakahleriteHide

Colour:
sulphur yellow
Streak:
pale yellow
Hardness:
2 - 3 on Mohs scale
Cleavage:
Perfect

Optical Data of MetakahleriteHide

Type:
Uniaxial (-)
RI values:
nω = 1.642 nε = 1.608
Max Birefringence:
δ = 0.034
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of MetakahleriteHide

Formula:
Fe2+(UO2)2(AsO4)2 · 8H2O

Crystallography of MetakahleriteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.2072 Å, b = 9.8242 Å, c = 13.2708 Å
α = 75.37°, β = 84.024°, γ = 81.839°
Ratio:
a:b:c = 0.734 : 1 : 1.351
Unit Cell V:
897.68 ų (Calculated from Unit Cell)

Type Occurrence of MetakahleriteHide

Other Language Names for MetakahleriteHide

Relationship of Metakahlerite to other SpeciesHide

Other Members of this group:
AbernathyiteK(UO2)(AsO4) · 3H2OTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2OTet.
LehneriteMn2+(UO2)2(PO4)2 · 8H2OMon.
Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2OTet. 4/mmm (4/m 2/m 2/m)
MetaheinrichiteBa(UO2)2(AsO4)2 · 8H2OTet. 4mm
MetakirchheimeriteCo(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
MetalodèviteZn(UO2)2(AsO4)2 · 10H2OTet.
MetanováčekiteMg(UO2)2(AsO4)2 · 8H2OTet. 4/m : P4/n
MetatorberniteCu(UO2)2(PO4)2 · 8H2OTet. 4/m : P4/n
Metauranocircite-IBa(UO2)2(PO4)2 · 7H2OMon. 2 : P21
MetauranospiniteCa(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
MetazeuneriteCu(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
Natrouranospinite(Na2,Ca)(UO2)2(AsO4)2 · 5H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
Uramarsite(NH4,H3O)2(UO2)2(AsO4,PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mmm
Uramphite(NH4)2(UO2)2(PO4)2 · 6H2OTet.

Related Minerals - Nickel-Strunz GroupingHide

8.EB.05AutuniteCa(UO2)2(PO4)2 · 11H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.EB.05HeinrichiteBa(UO2)2(AsO4)2 · 10H2OMon. 2/m
8.EB.05KahleriteFe(UO2)2(AsO4)2 · 12H2OTet. 4/m : P42/n
8.EB.05Nováčekite-IMg(UO2)2(AsO4)2 · 12H2OTric. 1 : P1
8.EB.05SaléeiteMg(UO2)2(PO4)2 · 10H2OMon. 2/m : P21/b
8.EB.05TorberniteCu(UO2)2(PO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.EB.05UranocirciteBa(UO2)2(PO4)2 · 10H2OTet.
8.EB.05UranospiniteCa(UO2)(AsO4)2 · 10H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.05Xiangjiangite(Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2OTet.
8.EB.05ZeuneriteCu(UO2)2(AsO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.EB.05MetarauchiteNi(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.05RauchiteNi(UO2)2(AsO4)2 · 10H2OTric. 1 : P1
8.EB.10BassetiteFe2+(UO2)2(PO4)2 · 10H2OMon. 2/m
8.EB.10LehneriteMn2+(UO2)2(PO4)2 · 8H2OMon.
8.EB.10Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2OTet. 4/mmm (4/m 2/m 2/m)
8.EB.10MetasaléeiteMg(UO2)2(PO4)2 · 8H2O
8.EB.10Metauranocircite-IBa(UO2)2(PO4)2 · 7H2OMon. 2 : P21
8.EB.10MetauranospiniteCa(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
8.EB.10MetaheinrichiteBa(UO2)2(AsO4)2 · 8H2OTet. 4mm
8.EB.10MetakirchheimeriteCo(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.10MetanováčekiteMg(UO2)2(AsO4)2 · 8H2OTet. 4/m : P4/n
8.EB.10MetatorberniteCu(UO2)2(PO4)2 · 8H2OTet. 4/m : P4/n
8.EB.10MetazeuneriteCu(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
8.EB.10PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2OOrth.
8.EB.10Meta-lodèviteZn(UO2)2(AsO4)2 · 10H2O
8.EB.15AbernathyiteK(UO2)(AsO4) · 3H2OTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
8.EB.15Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2OTet.
8.EB.15Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.15Natrouranospinite(Na2,Ca)(UO2)2(AsO4)2 · 5H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.15Trögerite(H3O)(UO2)(AsO4) · 3H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.15Uramphite(NH4)2(UO2)2(PO4)2 · 6H2OTet.
8.EB.15Uramarsite(NH4,H3O)2(UO2)2(AsO4,PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mmm
8.EB.20ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2OMon.
8.EB.20ChistyakovaiteAl(UO2)2(AsO4)2(F,OH) · 6.5H2OMon.
8.EB.25ArsenuranospathiteAl[(UO2)(AsO4)]2F(H2O)20Orth. mm2 : Pnn2
8.EB.25Uranospathite(Al,☐)(UO2)2(PO4)2F · 20(H2O,F)Orth. mm2 : Pnn2
8.EB.30Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2OMon.
8.EB.35CoconinoiteFe3+2Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2OMon.
8.EB.40RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2OMon.
8.EB.45TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2OTric.
8.EB.50FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2OTric. 1 : P1
8.EB.55SabugaliteHAl(UO2)4(PO4)4 · 16H2OMon. 2/m : B2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

40.2a.15.1KahleriteFe(UO2)2(AsO4)2 · 12H2OTet. 4/m : P42/n

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.7.1Trögerite(H3O)(UO2)(AsO4) · 3H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
20.7.2Natrouranospinite(Na2,Ca)(UO2)2(AsO4)2 · 5H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
20.7.3AbernathyiteK(UO2)(AsO4) · 3H2OTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
20.7.4MetazeuneriteCu(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
20.7.5ZeuneriteCu(UO2)2(AsO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
20.7.6MetanováčekiteMg(UO2)2(AsO4)2 · 8H2OTet. 4/m : P4/n
20.7.7Nováčekite-IMg(UO2)2(AsO4)2 · 12H2OTric. 1 : P1
20.7.8ArsenuranyliteCa(UO2)4(AsO4)2(OH)4 · 6H2OOrth.
20.7.9MetauranospiniteCa(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
20.7.10UranospiniteCa(UO2)(AsO4)2 · 10H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
20.7.11MetaheinrichiteBa(UO2)2(AsO4)2 · 8H2OTet. 4mm
20.7.12HeinrichiteBa(UO2)2(AsO4)2 · 10H2OMon. 2/m
20.7.13MetalodèviteZn(UO2)2(AsO4)2 · 10H2OTet.
20.7.14ArsenuranospathiteAl[(UO2)(AsO4)]2F(H2O)20Orth. mm2 : Pnn2
20.7.15HallimonditePb2(UO2)(AsO4)2 · nH2O, 0 ≤ n ≤ 0.5Tric. 1 : P1
20.7.16HügelitePb2(UO2)3(AsO4)2O2 · 5H2OMon.
20.7.17AsselbornitePb(BiO)3(UO2)4(AsO4)2(OH)7·4H2OIso.
20.7.19KahleriteFe(UO2)2(AsO4)2 · 12H2OTet. 4/m : P42/n
20.7.20MetakirchheimeriteCo(UO2)2(AsO4)2 · 8H2OTric. 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 MetakahleriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1960): 45: 254.
Walenta, K. (1964): Rare arsenate minerals with special consideration of occurrences in the Black Forest. Mineral. Petrog. Mitt. 9, 111-174. (in German)
American Mineralogist (1986): 71: 1037-1044.
Locock, Andrew J.; Burns, Peter C.; Flynn, Theodore M. (2004): Divalent transition metals and magnesium in structures that contain the autunite-type sheet. Canadian Mineralogist 42, 1699-1718.

Internet Links for MetakahleriteHide

Localities for MetakahleriteHide

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.
Austria
 
  • Carinthia
    • Friesach - Hüttenberg area
      • Hüttenberg
        • Hüttenberger Erzberg
          • Lölling District
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Menzenschwand
Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Schenkenzell
        • Wittichen
Markl, G. & Slotta, C. (2011): Die Uranmineralien des Lagerstättenreviers Wittichen im mittleren Schwarzwald. Lapis 36 (3), 25-37; 54 (in German).
          • Böckelsbach valley
Fleischer, M. (1960) New mineral names. American Mineralogist: 45: 254.; Vochten, R., De Grave, E., and Pelsmaekers, J. (1986) Synthesis, crystallographic and spectroscopic data, solubility, and electrokinetic properties of metakahlerite and its Mn analogue. American Mineralogist: 71: 1037.; Walenta, K. (1992) Die Mineralien des Schwarzwaldes. Weise (Munich).; Jambor, J.L., Pertsev, N.N., and Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 1195-1198.
          • Burgfelsen
No reference listed
          • Wüstenbächle
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Sulzburg
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Titisee-Neustadt
        • Hammereisenbach
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
  • Rhineland-Palatinate
    • Hunsrück
      • Birkenfeld
        • Ellweiler
Aufschluss 69/(7+8), Lapis 79/(7+8)
    • Palatinate
      • Winnweiler
Meisl, S (1985)
Namibia
 
  • Erongo Region
    • Omaruru District
      • Omaruru
Jahn, S. & Bast, R. (2006): Der Krantzberg bei Omaruru, Namibia, und die Mineralvorkommen in seiner Umgebung. Mineralien-Welt 17 (3), 32-48.
South Africa
 
  • Western Cape Province
    • Central Karoo District
      • Beaufort West
Minerals of South Africa
Switzerland
 
  • Wallis (Valais)
    • Binn Valley
Krzemnicki, M. (1992): As-Bi-Mineralisationen in der Monte-Leone-Decke im Mättital (Binntal-Region). Diplomarbeit, Universität Basel, Switzerland, 122 S.
    • Le Trient Valley
      • Les Marécottes
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 272.; - Meisser, N. (2012): La minéralogie de l'uranium dans le massif des Aiguilles Rouges. Matér. Géol. Suisse, Sér. géotech. 96, 183 p.
UK
 
  • Scotland
    • Dumfries & Galloway
Braithwaite, R.S.W. and Knight, J.R. (1990) Rare Minerals, Including Several New to Britain, in Supergene Alteration of U-Cu-As-Bi-Co Mineralisation Near Dalbeattie, South Scotland. Mineralogical Magazine, vol. 54, n° 374: 129-131.
BMS Database
Seward, T.M. (1975) pers. com.; Livingstone, A. and Macpherson, H.G. (1983) Fifth supplementary list of British minerals (Scottish). Mineralogical Magazine, vol. 47, n° 342, p. 99-105.
      • Needle's Eye
BMS Database; R. S. W. Braithwaite and J. R. Knight (1990) Rare Minerals, Including Several New to Britain, in Supergene Alteration of U-Cu-As-Bi-Co Mineralisation Near Dalbeattie, South Scotland. Mineralogical Magazine 54:129-131.
Mineral and/or Locality  
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