Andreybulakhite

Ni(C2O4)·2H2O
IMA status
  • Approved
IMA symbol
Adb
IMA approved
2023
Also known as
  • Andreybulakhiet
  • Andreybulakhitt

Where it forms, where it's found

Geological setting

samples of Cu–Ni ore colonized by Lecanora cf. polytropa lichens. Further research showed that the fruiting bodies of these lichens (apothecia) contain aqueous nickel oxalate, which was named andreybulakhite

Type locality
Nud II mine
  1. Monche tundra intrusion
  2. Murmansk Oblast
  3. Russia

67.8872°, 32.9011°

1recorded occurrences
Source · OpenStreetMap

Physical

Hardness
123456789101.5 – 2/ 10 MOHS
  1. 1Talc
  2. 2Gypsum
  3. 3Calcite
  4. 4Fluorite
  5. 5Apatite
  6. 6Orthoclase
  7. 7Quartz
  8. 8Topaz
  9. 9Corundum
  10. 10Diamond
Colour
colourless to pale green
Density
2.420 g/cm³

Optical

UV response
non-fluorescent under either short- or long-wave ultraviolet radiation.
Notes

mean refractive index calculated based on the Gladstone–Dale relationship is 1.594

Crystallography

Crystal system
Monoclinic
Space group
C2/c
Cell parameters
a = 11.8392(5) Å · b = 5.3312(2) Å · c = 9.8357(7) Å
Cell angles
β = 126.723(5) °
Ratio a:b:c
1 : 0.450 : 0.831
Z
4
Type-locality form

platy to prismatic crystals up to 2x1x1  µm in size that are combined into aggregates up to 40x30x30  µm in size embedded in a lichen reproductive structure (apothecia).

Crystal structure

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen615.99995.994
52.53%
28NiNickelNickel158.69358.693
32.12%
6CCarbonCarbon212.01124.022
13.14%
1HHydrogenHydrogen41.0084.032
2.21%
Total182.741100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From Mindat formula

Synonyms

  • Andreybulakhiet
  • Andreybulakhitt

In other languages

German
Andreybulakhit · IMA 2023-037

Classification

Strunz
10th ed.

10.AB.05

  • 10Organic CompoundsClass
  • 10.ASalts of organic acidsDivision
  • 10.ABOxalatesGroup
  • 10.AB.05AndreybulakhiteSpecies

Group, growth & confusion

In the same group
4 members

Literature, links & citation

Citations
  1. 1973Deyrieux, R., Berro, C., Peneloux, A. (1973) Contribution à l'étude des oxalates de certains métaux bivalents. III. Structure cristalline des oxalates dihydratés de manganèse, de cobalt, de nickel et de zinc. Polymorphisme des oxalates dihydratés de cobalt et de nickel [Oxalates of some divalent metals. III. Crystal structure of dihydrated manganese, cobalt, nickel, and zinc oxalates. Polymorphism of dihydrated cobalt and nickel oxalates]. Bulletin de la Société Chimique de France: 1973: 25-34.
  2. 1991Bickley, R.I., Edwards, H.G.M., Rose, S.J. (1991) A Raman spectroscopic study of nickel(II) oxalate dihydrate, NiC2O4·2H2O and dipotassium bisoxalatonickel(II) hexahydrate, K2Ni(C2O4)2·6H2O. Journal of Molecular Structure, 243 (3) 341-350 doi:10.1016/0022-2860(91)87048-mDOI: 10.1016/0022-2860(91)87048-m
  3. 2005Ahmad, Tokeer, Chopra, Reenu, Ramanujachary, Kandalam V., Lofland, Samuel E., Ganguli, Ashok K. (2005) Nanorods of Copper and Nickel Oxalates Synthesized by the Reverse Micellar Route. Journal of Nanoscience and Nanotechnology, 5 (11). 1840-1845 doi:10.1166/jnn.2005.440DOI: 10.1166/jnn.2005.440
  4. 2018Puzan, Anna N., Baumer, Vyacheslav N., Lisovytskiy, Dmytro V., Mateychenko, Pavel V. (2018) Structure transformations in nickel oxalate dihydrate NiC2O4·2H2O and nickel formate dihydrate Ni(HCO2)2·2H2O during thermal decomposition. Journal of Solid State Chemistry, 266. 133-142 doi:10.1016/j.jssc.2018.07.005DOI: 10.1016/j.jssc.2018.07.005
  5. 2023Bosi, Ferdinando, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2023) Newsletter 75. Mineralogical Magazine, 1-4 doi:10.1180/mgm.2023.76DOI: 10.1180/mgm.2023.76
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Andreybulakhite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/andreybulakhite-470878},
  note      = {Accessed 2026-05-11}
}