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Metarauchite

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About MetarauchiteHide

Luděk Rauch
Formula:
Ni(UO2)2(AsO4)2 · 8H2O
Colour:
Yellow to light greenish yellow
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
3.81 (Calculated)
Crystal System:
Triclinic
Member of:
Name:
Named in honor of Luděk Rauch (1 July 1951 - 5 December 1983, Jáchymov, Czech Republic), a Czech mineral collector who died tragically in the Jáchymov mines while collecting. Named according to the autunite group rules, thus 'meta' indicates a dehydrated state, even though metarauchite was described before rauchite.
Dehydrated analogue of rauchite.


Classification of MetarauchiteHide

Approved
Approval Year:
2008
First Published:
2010
Approval History:
2008-050
8.EB.05

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
40.2a.31.1

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

Physical Properties of MetarauchiteHide

Vitreous
Transparency:
Transparent, Translucent
Comment:
locally pearly on (011)
Colour:
Yellow to light greenish yellow
Streak:
light green to pale yellow strea
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
(011)
Fracture:
Irregular/Uneven
Density:
3.81 g/cm3 (Calculated)

Optical Data of MetarauchiteHide

Type:
Biaxial (-)
RI values:
nα = 1.625(3) nβ = 1.649(3) nγ = 1.649(3)
2V:
Calculated: 52°
Max Birefringence:
δ = 0.024
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic
Comments:
with β = 1.646, γ = 1.651 and to 23° with β = 1.649, γ = 1.650

Chemical Properties of MetarauchiteHide

Formula:
Ni(UO2)2(AsO4)2 · 8H2O

Crystallography of MetarauchiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.194(2) Å, b = 9.759(5) Å, c = 13.231(7) Å
α = 75.53(3)°, β = 84.01(3)°, γ = 81.59(3)°
Ratio:
a:b:c = 0.737 : 1 : 1.356
Unit Cell V:
887.53 ų (Calculated from Unit Cell)
Z:
2
Twinning:
multiply twinned along {011}

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.625 (100)
5.078 (25)
5.044 (29)
4.277 (29)
3.568 (50)
3.492 (28)
3.424 (26)
2.990 (21)

Type Occurrence of MetarauchiteHide

General Appearance of Type Material:
thick tabular crystals with a prevalence of the pinacoid (011)
Place of Conservation of Type Material:
Natural History Museum, National Museum, Prague, Czech Republic under the catalogue number P1p 19/2008
Geological Setting of Type Material:
Oxidation of Ag + As + Co + Ni ± Bi and U mineralization
Associated Minerals at Type Locality:
Reference:
Plášil, J., Sejkora, J., Čejka, J., Novák, M., Viñals, J., Ondruš, P., Veselovský, F., Škácha, P., Jehlička, J., Goliáš, V., Hluošek, J. (2010) Metarauchite, Ni(UO2)2(AsO4)2•8H2O, from Jáchymov and Schneeburg: a new member of the autunite group. Canadian Mineralogist: 48: 335-350.

Synonyms of MetarauchiteHide

Relationship of Metarauchite to other SpeciesHide

Member of:
Other Members of this group:
AutuniteCa(UO2)2(PO4)2 · 11H2OOrth. mmm (2/m 2/m 2/m) : Pnma
BassetiteFe2+(UO2)2(PO4)2 · 10H2OMon. 2/m
HeinrichiteBa(UO2)2(AsO4)2 · 10H2OMon. 2/m
KahleriteFe(UO2)2(AsO4)2 · 12H2OTet. 4/m : P42/n
Nováčekite-IMg(UO2)2(AsO4)2 · 12H2OTric. 1 : P1
Nováčekite-IIMg(UO2)2(AsO4)2 · 10H2OMon. 2/m
RauchiteNi(UO2)2(AsO4)2 · 10H2OTric. 1 : P1
SabugaliteHAl(UO2)4(PO4)4 · 16H2OMon. 2/m : B2/m
SaléeiteMg(UO2)2(PO4)2 · 10H2OMon. 2/m : P21/b
TorberniteCu(UO2)2(PO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
UranocirciteBa(UO2)2(PO4)2 · 10H2OTet.
UranospiniteCa(UO2)(AsO4)2 · 10H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
ZeuneriteCu(UO2)2(AsO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm

Common AssociatesHide

Associated Minerals Based on Photo Data:
Zeunerite1 photo of Metarauchite associated with Zeunerite on mindat.org.

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.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.10MetakahleriteFe2+(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
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.31.1ParsonsitePb2(UO2)(PO4)2Tric. 1 : P1

Fluorescence of MetarauchiteHide

Other InformationHide

Notes:
The crystals are readily soluble in cold 10% HCl acid
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 MetarauchiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Williams, P.A., Hatert, F., Pasero, M. (2008) New minerals approved in 2008. in International Mineralogical Association: 1-13.
Plášil, J., Sejkora, J., Čejka, J., Novák, M., Viñals, J., Ondruš, P., Veselovský, F., Škácha, P., Jehlička, J., Goliáš, V., Hluošek, J. (2010) Metarauchite, Ni(UO2)2(AsO4)2•8H2O, from Jáchymov and Schneeburg: a new member of the autunite group. Canadian Mineralogist: 48: 335-350.
Poirier, G., Tait, K.T., Rowe, R. (2011) New mineral names. American Mineralogist: 96: 936-945.

Internet Links for MetarauchiteHide

Localities for MetarauchiteHide

ⓘ - 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.
Czech Republic
 
  • Karlovy Vary Region
    • Krušné Hory Mts (Erzgebirge)
      • Jáchymov District (St Joachimsthal)
[AmMin 84:688]
Tvrdý, J. & Plášil, J. (2010): Jáchymov - Reiche Erzlagerstätte und Radonbad im böhmischen Westerzgebirge. Aufschluss 61, 277-292; Plášil, J., Sejkora, J., Čejka, J., Novák, M., Viñals, J., Ondruš, P., Veselovský, F., Škácha, P., Jehlička, J., Goliáš, V., Hluošek, J. (2010): Metarauchite, Ni(UO2)2(AsO4)2•8H2O, from Jáchymov and Schneeburg: a new member of the autunite group. Canadian Mineralogist, 48, 335-350.
Germany
 
  • Baden-Württemberg
    • Black Forest
      • 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
Markl, G. & Slotta, C. (2011): Die Uranmineralien des Lagerstättenreviers Wittichen im mittleren Schwarzwald. Lapis 36 (3), 25-37; 54 (in German).
  • Saxony
    • Erzgebirge District
      • Schneeberg
        • Neustädtel
Plášil, J., Sejkora, J., Čejka, J., Novák, M., Viñals, J., Ondruš, P., Veselovský, F., Škácha, P., Jehlička, J., Goliáš, V., Hluošek, J. (2010): Metarauchite, Ni(UO2)2(AsO4)2•8H2O, from Jáchymov and Schneeburg: a new member of the autunite group. Canadian Mineralogist, 48, 335-350.
Russia
 
  • Adygea
Victor V. Levitskiy Collection
Mineral and/or Locality  
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