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Natroxalate

A valid IMA mineral species
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08533960014947360905139.jpg
Natroxalate

Kukisvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
09160150014947360905606.jpg
Natroxalate

Kukisvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
08533960014947360905139.jpg
Natroxalate

Kukisvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
09160150014947360905606.jpg
Natroxalate

Kukisvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
08533960014947360905139.jpg
Natroxalate

Kukisvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
09160150014947360905606.jpg
Natroxalate

Kukisvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
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About NatroxalateHide

Formula:
Na2(C2O4)
Colour:
Light yellow color with a pink or greenish tint, creamy in fine-grained aggregates
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.32
Crystal System:
Monoclinic
Name:
Named in 1996 by Alexander Petrovich Khomyakov after its chemical composition of sodium (latin, natrium) and oxalate
This page provides mineralogical data about Natroxalate.


Unique IdentifiersHide

Mindat ID:
7187
Long-form identifier:
mindat:1:1:7187:7
GUID
(UUID V4):
e39f2638-46c5-4087-9fc6-876bd6856368

IMA Classification of NatroxalateHide

Classification of NatroxalateHide

Strunz-mindat (2023):
10.AB.60

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

Physical Properties of NatroxalateHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Light yellow color with a pink or greenish tint, creamy in fine-grained aggregates
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
perfect {100} and distinct {001} and {221} cleavages
Fracture:
Step-Like
Density:
2.32(3) g/cm3 (Measured)    2.338 g/cm3 (Calculated)

Optical Data of NatroxalateHide

Type:
Biaxial (-)
RI values:
nα = 1.415(2) nβ = 1.524(2) nγ = 1.592(2)
2V:
Measured: 72° (1), Calculated: 72°
Max Birefringence:
δ = 0.177
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
relatively strong, r > v
Comments:
b = Z, c ∧ X = 20deg in obtuse angle b, optic axial plane normal to (010).

Chemistry of NatroxalateHide

Mindat Formula:
Na2(C2O4)
Elements listed:
C, Na, O - search for minerals with similar chemistry

Crystallography of NatroxalateHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 10.426(9) Å, b = 5.255(5) Å, c = 3.479(3) Å
β = 92.14(8)°
Ratio:
a:b:c = 1.984 : 1 : 0.662
Unit Cell V:
190.48 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Prismatic, elongate [001], showing {110}, {001}, {010}, {100}, and {221}
Twinning:
Some crystals are twinned on (110).

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009741NatroxalateReed D A, Olmstead M M (1981) Sodium oxalate structure refinement Acta Crystallographica B37 938-9391981synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.826 Å(100)
2.602 Å(56)
2.334 Å(33)
2.898 Å(27)
2.041 Å(14)
5.203 Å(13)
2.117 Å(13)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
22 : Hydration and low-? subsurface aqueous alteration (see also #23)
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere<0.6
52 : Guano- and urine-derived minerals<0.4

Type Occurrence of NatroxalateHide

Type Locality:
ⓘ Alluaiv Mountain, Lovozersky District, Murmansk Oblast, Russia
General Appearance of Type Material:
Granular nodules to 1–2 cm, as veinlet-like segregations, as columnar crystals 3–5 mm long and up to 1 mm thick, and as radiating aggregates of the crystals.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow, Russia.
Geological Setting of Type Material:
Hydrothermal phase in ultra-agpaitic pegmatites and hydrothermalites.
Associated Minerals at Type Locality:
SphaleritePyriteNenadkevichiteNenadkevichiteNatron
GalenaElpiditeAlbiteAegirine
Reference:
Khomyakov, A.P. (1996) Natroxalate Na2C2O4 – a new mineral. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 125(1): 126-132.
Download:
https://rruff.info/rruff_1.0/uploads/ZVMO125N1_126.pdf

Synonyms of NatroxalateHide

Other Language Names for NatroxalateHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Natroxalate associated with SalammoniacNH4Cl
3 photos of Natroxalate associated with Möhnite(NH4)K2Na(SO4)2
3 photos of Natroxalate associated with NitratineNaNO3
2 photos of Natroxalate associated with TriazoliteNaCu2(N3C2H2)2(NH3)2Cl3 · 4H2O
2 photos of Natroxalate associated with ChanabayaiteCuCl(N3C2H2)(NH3) · 0.25H2O
2 photos of Natroxalate associated with JoanneumiteCu(C3N3O3H2)2(NH3)2

Related Minerals - Strunz-mindat GroupingHide

10.AB.Deveroite-(Ce)Ce2(C2O4)3 · 10H2OMon. 2/m : P21/b
10.AB.XFalottaiteMnC2O4 · 3H2OOrth. mmm (2/m 2/m 2/m)
10.AB.Uroxite [(UO2)2(C2O4)(OH)2(H2O)2] · H2OMon. 2/m : P21/b
10.AB.AndreybulakhiteNi(C2O4) · 2H2OMon. 2/m : B2/b
10.AB.EdwindavisiteCu(C2O4)(NH3)Orth. mmm (2/m 2/m 2/m) : Pbca
10.AB.05HumboldtineFe2+(C2O4) · 2H2OMon. 2/m
10.AB.05LindbergiteMn2+(C2O4) · 2H2OMon. 2/m
10.AB.05KatsarositeZn(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/b
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/b
10.AB.47FiemmeiteCu2(C2O4)(OH)2 · 2H2OMon. 2/m : P21/b
10.AB.50CaoxiteCa(C2O4) · 3H2OTric. 1 : P1
10.AB.50MiddlebackiteCu2C2O4(OH)2Mon. 2/m : P21/b
10.AB.52Metauroxite(UO2)2(C2O4)(OH)2(H2O)2Tric. 1 : P1
10.AB.55Oxammite(NH4)2(C2O4) · H2OOrth. 2 2 2 : P21 21 2
10.AB.60Phoxite(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4Mon. 2/m : P21/b
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. 2/m : B2/b
10.AB.80NovgorodovaiteCa2(C2O4)Cl2 · 2H2OMon. 2/m

Other InformationHide

IR Spectrum:
Strong absorption bands at 520, 775, 1320, 1340, and 1640 cm-1, characteristic of oxalates.
Thermal Behaviour:
Exothermic effect at 550 degC (24.1 wt% loss versus 20.1 wt% calculated) corresponding to oxidation to form sodium carbonate
and CO2; an endothermic peak at 880 degC represents melting
and partial vaporization of the sodium carbonate.
Notes:
Readily soluble in weak acids and in water.
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 NatroxalateHide

References for NatroxalateHide

Reference List:
Reed, D.A., Olmstead, M.M. (1981) Sodium oxalate structure refinement. Acta Crystallographica: B37: 938-939.
Khomyakov, A.P. (1996) Natroxalate Na2C2O4 – a new mineral. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 125(1): 126-132.
Khomyakov, A.P. (1996) Natroxalate Na2C2O4 – a new mineral. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 125(1): 126-132.
Mineralogical Record (1997): 2: 222.
Jambor, J.L., Pertsev, N.N., Roberts, A.C. (1997) New mineral names. American Mineralogist: 82: 430-433.
Frost, R.L., Weier, M.L. (2003) Raman spectroscopy of natural oxalates at 298 and 77 K. Journal of Raman Spectroscopy: 34: 776-785.
Echigo, T., Kimata, M. (2010) Crystal chemistry and genesis of organic minerals: A review of oxalate and polycyclic aromatic hydrocarbon minerals. The Canadian Mineralogist: 48: 1329-1358.
Piro, O.E., Baran, E.J. (2018) Crystal chemistry of organic minerals-salts of organic acids: the synthetic approach. Crystallography Reviews: 24: 149-175.

Localities for NatroxalateHide

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 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.
Chile
 
  • Tarapacá
    • Iquique Province
      • Chanabaya
samples analysed by Gerhard Mohn and Joy Desor
Chukanov, Nikita V., Zubkova, Natalia V., Möhn, Gerhard, Pekov, Igor V., Belakovskiy, Dmitriy I., Van, Konstantin V., Britvin, Sergey N., Pushcharovsky, Dmitry Y. (2018) Triazolite, NaCu2(N3C2H2)2(NH3)2Cl3·4H2O, a new mineral species containing 1,2,4-triazolate anion, from a guano deposit at Pabellón de Pica, Iquique Province, Chile. Mineralogical Magazine: 82(4): 1007-1014.
Russia
 
  • Murmansk Oblast
    • Khibiny Massif
PEKOV, I.V. & NIKOLAEV, A.P. (2013) Minerals of the pegmatites and hydrothermal assemblages of the Koashva deposit (Khibiny, Kola Peninsula, Russia). Mineralogical Almanac 189(2), 7-65.
    • Lovozersky District
Khomyakov, A.P. (1996) Natroxalate Na2C2O4 – a new mineral. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 125(1): 126-132.
Pekov, Igor V. (1998) Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow. 369pp.
        • Umbozero mine
Pekov, Igor V. (1998) Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow. 369pp.
Pekov, I. V., Chukanov, N. V., Khomyakov, A. P., Rastsvetaeva, R. K., Kucherinenko, Y. V., Nedel'ko, V. V. (1999) Korobitsynite, Na3-x(Ti,Nb)2[Si4O12](OH,O)2·3-4H2O, a new mineral from Lovozero massif, Kola Peninsula. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 128 (3) 72-79
Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.
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