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Metanatroautunite

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Formula:
Na(UO2)(PO4)(H2O)3
Colour:
Lemon-yellow
Lustre:
Sub-Vitreous, Waxy, Pearly
Hardness:
2 - 2½
Specific Gravity:
3.62 (Calculated)
Crystal System:
Tetragonal
Name:
Named 1957 by A. A. Chernikov, O. V. Krutetskaya, and N. I. Organova for it being a sodium-rich member of the autunite group. Originally published as "sodium autunite", but changed in the same year by the authors to "natroautunite". Renamed "meta-natroautunite" in 1994 by A. A. Chernikov and N. I. Organova for the dehydrated relationship of the described mineral.
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Classification of MetanatroautuniteHide

Approved, 'Grandfathered' (first described prior to 1959)
40.2a.5.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
19.11.6

19 : Phosphates
11 : Phosphates of U

Physical Properties of MetanatroautuniteHide

Sub-Vitreous, Waxy, Pearly
Transparency:
Transparent, Translucent
Colour:
Lemon-yellow
Streak:
White
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{001}
Fracture:
Micaceous
Density:
3.62 g/cm3 (Calculated)

Optical Data of MetanatroautuniteHide

Type:
Uniaxial (-)
RI values:
nω = 1.578 nε = 1.559
Birefringence:
0.019
Max Birefringence:
δ = 0.019
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Visible
Comments:
O = light yellow, E = pale yellow

Chemical Properties of MetanatroautuniteHide

Formula:
Na(UO2)(PO4)(H2O)3
IMA Formula:
Na(UO2)(PO4) · 3H2O

Crystallography of MetanatroautuniteHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P4/ncc
Cell Parameters:
a = 6.9935(7) Å, c = 17.5101(12) Å
Ratio:
a:c = 1 : 2.504
Unit Cell V:
856.4 ų
Z:
4
Comment:
Mills et al. (2012)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.67 (100)
3.23 (70)
2.675 (80)
1.639 (70)
1.566 (80b)
1.540 (80b)
1.367 (70)
Comments:
Natural material

Type Occurrence of MetanatroautuniteHide

General Appearance of Type Material:
Pale yellow platy crystals, sometimes in foliated or radiating aggregates
Geological Setting of Type Material:
Oxidation zone of a uranium deposit
Associated Minerals at Type Locality:

Synonyms of MetanatroautuniteHide

Other Language Names for MetanatroautuniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Albite1 photo of Metanatroautunite associated with Albite on mindat.org.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.11.1LermontoviteU(PO4)(OH) · H2OOrth. mmm (2/m 2/m 2/m) : Ccca
19.11.2MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2OOrth. mmm (2/m 2/m 2/m) : Fddd
19.11.3VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2OOrth.
19.11.4Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2OTet.
19.11.5VyacheslaviteU(PO4)(OH) · nH2OOrth.
19.11.7YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
19.11.8Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
19.11.9Uramphite(NH4)2(UO2)2(PO4)2 · 6H2OTet.
19.11.10TorberniteCu(UO2)2(PO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
19.11.11MetatorberniteCu(UO2)2(PO4)2 · 8H2OTet. 4/m : P4/n
19.11.12SaléeiteMg(UO2)2(PO4)2 · 10H2OMon. 2/m : P21/b
19.11.13NingyoiteCaU(PO4)2 · 1-2H2OOrth.
19.11.14Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2OTet. 4/mmm (4/m 2/m 2/m)
19.11.15AutuniteCa(UO2)2(PO4)2 · 11H2OOrth. mmm (2/m 2/m 2/m) : Pnma
19.11.16Pseudo-autunite(H3O)4Ca2(UO2)2(PO4)4 · 5H2OOrth.
19.11.17PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2OOrth.
19.11.18Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
19.11.19UlrichiteCaCu(UO2)(PO4)2 · 4H2OMon.
19.11.20BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2OMon. 2/m : P21/b
19.11.21Metauranocircite-IBa(UO2)2(PO4)2 · 7H2OMon. 2 : P21
19.11.22UranocirciteBa(UO2)2(PO4)2 · 10H2OTet.
19.11.23RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2OMon.
19.11.24TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2OTric.
19.11.25MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2OOrth.
19.11.26UpaliteAl(UO2)3(PO4)2O(OH) · 7H2OMon.
19.11.27FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2OTric. 1 : P1
19.11.28ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2OMon.
19.11.29PhuralumiteAl2(UO2)3(PO4)3(OH)2 · 13H2OMon.
19.11.30MoreauiteAl3(UO2)(PO4)3(OH)2 · 13H2O
19.11.31SabugaliteHAl(UO2)4(PO4)4 · 16H2OMon. 2/m : B2/m
19.11.32Uranospathite(Al,☐)(UO2)2(PO4)2F · 20(H2O,F)Orth. mm2 : Pnn2
19.11.33AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2OTric. 1 : P1
19.11.34Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2OMon.
19.11.35Kivuite(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
19.11.36ParsonsitePb2(UO2)(PO4)2Tric. 1 : P1
19.11.37DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2OOrth. mmm (2/m 2/m 2/m) : Cmma
19.11.38DumontitePb2(UO2)3(PO4)2(OH)4 · 3H2OMon. 2/m : P21/m
19.11.39PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2OOrth.
19.11.40LehneriteMn2+(UO2)2(PO4)2 · 8H2OMon.
19.11.41BassetiteFe2+(UO2)2(PO4)2 · 10H2OMon. 2/m
19.11.42Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2OMon.

Fluorescence of MetanatroautuniteHide

Fluoresces yellow green in SW and LW UV

Other InformationHide

Health Risks:
Contains uranium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest. Avoid prolonged exposure in proximity of the body. Store away from inhabited areas.

References for MetanatroautuniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chernikov, A.A., Krutetskaya, O.V. and Organova, N.I., 1957: Natroautunite. Soviet Journal of Atomic Energy, 3, 901–5.
Butt, C. R. M. and Graham, J., 1981: Sodian potassian hydroxonian meta-autunite: first natural occurrence of an intermediate member of a predicted solid solution series. American Mineralogist, 66, 1068–72.
Chernikov, A. A. 1981: Behaviour of Uranium in the Hypergene Zone. Nedra, Moscow, Russia, 24p (In Russ.).
Chernikov, A. A. and Organova, N. I., 1994: Natroautunite and metanatroautunite. Transactions of the Russian Academy of Sciences, 341A, 109–113.
Mills, S. J. (2004) Metanatroautunite (‘sodium autunite’) from the Lake Boga Granite, Victoria, Australian Journal of Mineralogy, 10 (1), 29–31.
Mineralogical Record 39 (2008), 131
Mills, S. J. and Birch, W. D. (2010) Uranmineralien aus dem Lake-Boga-Granit, Victoria, Australien. Mineralien-Welt, 21(3), 62–67. (In German)
Mills, S. J., Birch, W. D. and Kampf, A. R. (2012) The crystal structure of metanatroautunite, Na[(UO2)(PO4)](H2O)3, from the Lake Boga granite, Victoria, Australia. American Mineralogist, 97(4), 735–738.

Internet Links for MetanatroautuniteHide

Localities for MetanatroautuniteHide

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.
Australia
 
  • South Australia
    • Mt Lofty Ranges
      • North Mt Lofty Ranges
        • Robertstown
Peter Elliott
  • Victoria
    • Swan Hill Rural City
      • Lake Boga
S.J. Mills (2004)- Metanatroautunite ('sodium autunite') from the Lake Boga Granite, Victoria - Austalian Journal of Mineralogy, Vol. 10, n°1; Mills, S. J. & Birch, W. D. (2010) Uranmineralien aus dem Lake-Boga-Granit, Victoria, Australien. Mineralien-Welt, 21(3), 62–67. (In German)
  • Western Australia
    • Menzies Shire
      • Menangina Station
C.R.M. Butt and J. Graham, Am. Min. vol. 66 pp. 1068-1072 (1981)
Tajikistan (TL)
 
  • Viloyati Sogd (Viloyati Sughd; Viloyati Khodzhent; Viloyati Leninabad)
    • Khodzhent (Leninabad)
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
USA
 
  • South Dakota
    • Harding Co.
      • Cave Hills
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
      • North Cave Hills
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
      • Slim Buttes
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
Mineral and/or Locality  
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