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NaMgAl(C2O4)3 · 8H2O
Synthetic material: Na[Mg(H2O)6][Al0.55Fe0.45(C2O4)3]·3H2O
Smokey-green (daylight), violet (artificial light)
Specific Gravity:
Crystal System:
Named after Yuri Apollonovich Zhemchuzhnikov (1885-1957), Russian clay mineralogist.
Isostructural with:
The Al analogue of stepanovite. Unique combination of elements.

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Classification of ZhemchuzhnikoviteHide


A : Salts of organic acids
B : Oxalates

1 : Oxalates

31 : Oxalates, Citrates, Mellitates and Acetates
1 : Oxalates

Physical Properties of ZhemchuzhnikoviteHide

Smokey-green (daylight), violet (artificial light)
1.69 g/cm3 (Measured)    1.66 g/cm3 (Calculated)

Optical Data of ZhemchuzhnikoviteHide

Uniaxial (-)
RI values:
nω = 1.479 nε = 1.408
Max Birefringence:
δ = 0.071
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
greenish-yellow (O), reddish violet (E)

Chemical Properties of ZhemchuzhnikoviteHide

NaMgAl(C2O4)3 · 8H2O

Synthetic material: Na[Mg(H2O)6][Al0.55Fe0.45(C2O4)3]·3H2O
IMA Formula:
NaMgAl(C2O4)3 · 9H2O
Emperical Formula (of original material):
Common Impurities:

Crystallography of ZhemchuzhnikoviteHide

Crystal System:
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
Cell Parameters:
a = 16.7 Å, c = 12.5 Å
a:c = 1 : 0.749
Unit Cell V:
3,019.07 ų (Calculated from Unit Cell)
acicular to fibrous
Space group for the synthetic material, that has been shown to be identical to the natural one; parameters for the synthetic material: a=16.8852, c=12.5368

Type Occurrence of ZhemchuzhnikoviteHide

General Appearance of Type Material:
acicular to fibrous, with {0001},
{11_20}, {22_41}
Geological Setting of Type Material:
from a drill core from 230 m depth, where it forms veinlets within brown coal saturated with acetic acid
Associated Minerals at Type Locality:

Other Language Names for ZhemchuzhnikoviteHide

Related Minerals - Nickel-Strunz GroupingHide

10.AB.Deveroite-(Ce)Ce2(C2O4)3 · 10H2OMon. 2/m : P21/b
10.AB.XFalottaiteMnC2O4 · 3H2OOrth.
10.AB.Uroxite [(UO2)2(C2O4)(OH)2(H2O)2] · H2OMon. 2/m : P21/b
10.AB.05HumboldtineFe2+(C2O4) · 2H2OMon. 2/m
10.AB.05LindbergiteMn2+(C2O4) · 2H2OMon. 2/m
10.AB.10GlushinskiteMg(C2O4) · 2H2OMon.
10.AB.15MoolooiteCu(C2O4) · 0.4H2OOrth.
10.AB.20StepanoviteNaMgFe3+(C2O4)3 · 8-9H2OTrig. 3m : P3c1
10.AB.25MinguzziteK3Fe3+(C2O4)3 · 3H2OMon. 2/m : P21/b
10.AB.30WheatleyiteNa2Cu(C2O4)2 · 2H2OTric.
10.AB.40WeddelliteCa(C2O4) · (2.5-x)H2OTet. 4/m : I4/m
10.AB.45WhewelliteCa(C2O4) · H2OMon. 2/m : P21/b
10.AB.50CaoxiteCa(C2O4) · 3H2OTric.
10.AB.55Oxammite(NH4)2(C2O4) · H2OOrth. 2 2 2 : P21 21 2
10.AB.65Coskrenite-(Ce)(Ce,Nd,La)2(C2O4)(SO4)2 · 12H2OTric.
10.AB.70Levinsonite-(Y)(Y,Nd,La)Al(C2O4)(SO4)2 · 12H2OMon. 2/m
10.AB.75Zugshunstite-(Ce)(Ce,Nd,La)Al(C2O4)(SO4)2 · 12H2OMon.
10.AB.80NovgorodovaiteCa2(C2O4)Cl2 · 2H2OMon. 2/m

Related Minerals - Dana Grouping (8th Ed.)Hide · 8-9H2OTrig. 3m : P3c1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

31.1.1Oxammite(NH4)2(C2O4) · H2OOrth. 2 2 2 : P21 21 2
31.1.2MoolooiteCu(C2O4) · 0.4H2OOrth.
31.1.3WheatleyiteNa2Cu(C2O4)2 · 2H2OTric.
31.1.4GlushinskiteMg(C2O4) · 2H2OMon.
31.1.5WhewelliteCa(C2O4) · H2OMon. 2/m : P21/b
31.1.6WeddelliteCa(C2O4) · (2.5-x)H2OTet. 4/m : I4/m
31.1.7HumboldtineFe2+(C2O4) · 2H2OMon. 2/m
31.1.8StepanoviteNaMgFe3+(C2O4)3 · 8-9H2OTrig. 3m : P3c1
31.1.10MinguzziteK3Fe3+(C2O4)3 · 3H2OMon. 2/m : P21/b

Other InformationHide

soluble in water to give a solution of pH ca. 5.51
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 ZhemchuzhnikoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Knipovich, Yu.N., Komkov, A.I. and Nefedov, E.I. (1963): On stepanovite and the new mineral zhemchuzhnikovite. Trudy Vses. Nauchno-Issled. Geol. Inst. (V.S.E.G.E.I.), 96, 131-135 (in Russian).
American Mineralogist (1964): 49: 442-443. [Abs.]
Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. (2016)
Piro, O.E., Echeverría, G.A., González-Baró, A.C., Baran, E.J. (2016): Crystal and molecular structure and spectroscopic behavior of isotypic synthetic analogs of the oxalate minerals stepanovite and zhemchuzhnikovite. Physics and Chemistry of Minerals, 43, 287-300.

Internet Links for ZhemchuzhnikoviteHide

Localities for ZhemchuzhnikoviteHide

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.
Russia (TL)
  • Sakha Republic (Yakutia)
    • Polar Yakutia
      • Bulun District
        • Lena River Basin
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
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