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Novgorodovaite

A valid IMA mineral species
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02060910017271929723331.jpg
Novgorodovaite

Chelkar salt dome, Aksai Valley, Terekti District, West Kazakhstan Region, Kazakhstan
02060910017271929723331.jpg
Novgorodovaite

Chelkar salt dome, Aksai Valley, Terekti District, West Kazakhstan Region, Kazakhstan
02060910017271929723331.jpg
Novgorodovaite

Chelkar salt dome, Aksai Valley, Terekti District, West Kazakhstan Region, Kazakhstan
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About NovgorodovaiteHide

03944880017271929752240.jpg
Margarita I. Novgorodova
Formula:
Ca2(C2O4)Cl2 · 2H2O
Colour:
colourless
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
2.38
Crystal System:
Monoclinic
Name:
Named in honor of Margarita Ivanovna Novgorodova (Новгородова Маргарита Ивановна) (b. 15 March 1938), Russian mineralogist and specialist in gold mineralogy. She was director of the A. E. Fersman Mineralogical Museum from 1996 to 2010.
This page provides mineralogical data about Novgorodovaite.


Unique IdentifiersHide

Mindat ID:
11432
Long-form identifier:
mindat:1:1:11432:7

IMA Classification of NovgorodovaiteHide

Classification of NovgorodovaiteHide

Strunz-mindat (2026):
10.AB.80

10 : ORGANIC COMPOUNDS
A : Salts of organic acids
B : Oxalates

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
NovIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of NovgorodovaiteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
2½ on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {100} and {010}
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.38(1) g/cm3 (Measured)    2.40 g/cm3 (Calculated)

Optical Data of NovgorodovaiteHide

Type:
Biaxial (-)
RI values:
nα = 1.565(2) nβ = 1.645(2) nγ = 1.725(4)
2V:
Measured: 88° (10), Calculated: 87°
Max. Birefringence:
δ = 0.160
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure - the conoscopic view for a grain cut perpendicular to the acute bisectrix, using this mineral's 2V. The two small white dots mark the melatopes - the points where the two optic axes emerge - and are shown only when they fall within the field of view. The coloured bands are isochromatics, and the dark bands are isogyres.

Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Pleochroism:
Non-pleochroic

Chemistry of NovgorodovaiteHide

Mindat Formula:
Ca2(C2O4)Cl2 · 2H2O
Element Weights:
Element% weight
O34.894 %
Ca29.136 %
Cl25.774 %
C8.732 %
H1.466 %

Calculated from ideal end-member formula.
O
Ca
Cl
C
H
Elements listed:
C, Ca, Cl, H, O - search for minerals with similar chemistry

Crystallography of NovgorodovaiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
I2/m
Cell Parameters:
a = 6.936(3) Å, b = 7.382(3) Å, c = 7.443(3) Å
β = 94.3°, γ = 1°
Ratio:
a:b:c = 0.94 : 1 : 1.008
Unit Cell V:
380.02 ų
Z:
2
Morphology:
aggregates to 3 cm of grains to 7 mm

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0012496NovgorodovaiteRastsvetaeva R K, Chukanov N V, Nekrasov Y V (2001) Crystal structure of novgorodovaite, Ca2(C2O4)Cl2*2H2O Doklady Akademii Nauk SSSR 381 353-35520010293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
25 : Evaporites (prebiotic)

Type Occurrence of NovgorodovaiteHide

Type Locality:
ⓘ Chelkar salt dome, Aksai Valley, Terekti District, West Kazakhstan Region, Kazakhstan
General Appearance of Type Material:
grains up to 7 mm in size
Place of Conservation of Type Material:
Fersman Mineralogical Museum of Russian Academy of Sciences, Moscow.
Geological Setting of Type Material:
in a salt dome, observed in a drill core sample from 850 – 900 m depth
Reference:
Chukanov, N.V., D.I. Belakovskii, R.K. Rastsvetaeva, O.V. Karimova, A.E. Zadov (2001) Novgorodovaite Ca2(C2O4)Cl2·2H2O, a new mineral. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 130(4): 32-35.

Synonyms of NovgorodovaiteHide

Other Language Names for NovgorodovaiteHide

Related Minerals - Strunz-mindat GroupingHide

10.AB.Deveroite-(Ce)Ce2(C2O4)3 · 10H2OMon. 2/m : P21/c
10.AB.EdwindavisiteCu(C2O4)(NH3)Orth. mmm(2/m2/m2/m) : Pbca
10.AB.XFalottaiteMnC2O4 · 3H2OOrth. mmm(2/m2/m2/m)
10.AB.Uroxite [(UO2)2(C2O4)(OH)2(H2O)2] · H2OMon. 2/m : P21/c
10.AB.05KatsarositeZn(C2O4) · 2H2OMon. 2/m : B2/b
10.AB.05AndreybulakhiteNi(C2O4) · 2H2OMon. 2/m : B2/b
10.AB.05HumboldtineFe2+(C2O4) · 2H2OMon. 2/m : B2/b
10.AB.05LindbergiteMn2+(C2O4) · 2H2OMon. 2/m : B2/b
10.AB.10GlushinskiteMg(C2O4) · 2H2OMon. 2/m : B2/b
10.AB.15MoolooiteCu(C2O4) · nH2OOrth.
10.AB.20StepanoviteNaMgFe3+(C2O4)3 · 8-9H2OTrig. 3m : P3c1
10.AB.25MinguzziteK3Fe3+(C2O4)3 · 3H2OMon. 2/m : P21/c
10.AB.30WheatleyiteNa2Cu(C2O4)2 · 2H2OTric. 1 : P1
10.AB.35ZhemchuzhnikoviteNaMgAl(C2O4)3 · 8H2OTrig. 3m : P3c1
10.AB.40WeddelliteCa(C2O4) · (2.5-x)H2OTet. 4/m : I4/m
10.AB.45WhewelliteCa(C2O4) · H2OMon. 2/m : P21/c
10.AB.47FiemmeiteCu2(C2O4)(OH)2 · 2H2OMon. 2/m : P21/c
10.AB.50CaoxiteCa(C2O4) · 3H2OTric. 1 : P1
10.AB.50MiddlebackiteCu2C2O4(OH)2Mon. 2/m : P21/c
10.AB.52Metauroxite(UO2)2(C2O4)(OH)2(H2O)2Tric. 1 : P1
10.AB.55Oxammite(NH4)2(C2O4) · H2OOrth. 222 : P21212
10.AB.60NatroxalateNa2(C2O4)Mon. 2/m : P21/c
10.AB.60Phoxite(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4Mon. 2/m : P21/c
10.AB.60Carboferriphoxite[(NH4)K(H2CO3)][Fe3+(HPO4)(H2PO4)(C2O4)]Tric. 1 : P1
10.AB.60Ferriphoxite[(NH4)2K(H2O)][Fe3+(HPO4)2(C2O4)]Mon. 2/m : P21/c
10.AB.65Coskrenite-(Ce)Ce2(SO4)2(C2O4) · 8H2OTric.
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. 2/m : B2/b

Fluorescence of NovgorodovaiteHide

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.

Internet Links for NovgorodovaiteHide

References for NovgorodovaiteHide

Localities for NovgorodovaiteHide

Showing 1 localities.

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.
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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Kazakhstan (TL)
 
  • West Kazakhstan Region
    • Terekti District
      • Aksai Valley
Chukanov et al. (2001)
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