Antipinite
A valid IMA mineral species
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About Antipinite
Mikhail Y. Antipin
Formula:
KNa3Cu2(C2O4)4
Colour:
Blue
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.53
Crystal System:
Triclinic
Name:
In memory of Mikhail Yuvenal’evich Antipin (Михаил Ювенальевич Антипин) (25 August 1951, Moscow, USSR – 19 February 2013, Moscow, USSR), chemist and specialist in the crystallography and crystal chemistry of organometallic and coordination compounds, at the Institute of Organoelement Compounds. He was awarded the Prize of the Russian Academy of Sciences for these investigations. He was also a professor of chemistry at the Peoples' Friendship University.
Unique combination of elements (the only K-Na-Cu oxalate mineral known). The second Na- and Cu-bearing oxalate mineral after wheatleyite. Compare other Cu-bearing oxalate minerals - middlebackite, moolooite and fiemmeite.
Unique Identifiers
Mindat ID:
46162
Long-form identifier:
mindat:1:1:46162:3
GUID
(UUID V4):
(UUID V4):
9fd45af5-97e5-4275-a6d3-96951dc71954
IMA Classification of Antipinite
Approved
Approval year:
2014
First published:
2015
Type description reference:
Chukanov, Nikita V., Aksenov, Sergey M., Rastsvetaeva, Ramiza K., Lyssenko, Konstantin A., Belakovskiy, Dmitriy I., Färber, Gunnar, Möhn, Gerhard, Van, Konstantin V. (2015) Antipinite, KNa3Cu2(C2O4)4, a new mineral species from a guano deposit at Pabellón de Pica, Chile. Mineralogical Magazine, 79 (5) 1111-1121 doi:10.1180/minmag.2015.079.5.07
Classification of Antipinite
10.00.
10 : ORGANIC COMPOUNDS
0 :
0 :
10 : ORGANIC COMPOUNDS
0 :
0 :
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Atp | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Antipinite
Vitreous
Transparency:
Translucent
Colour:
Blue
Comment:
pale blue, almost white
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
in three directions
in three directions
Density:
2.53(3) g/cm3 (Measured) 2.549 g/cm3 (Calculated)
Optical Data of Antipinite
Type:
Biaxial (+)
RI values:
nα = 1.432(3) nβ = 1.530(1) nγ = 1.698(5)
2V:
Measured: 75° , Calculated: 82°
Max Birefringence:
δ = 0.266
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Bireflectance:
strong, r < v
Pleochroism:
Strong
Comments:
blue on Z, light blue on Y, colourless on X;
Chemistry of Antipinite
Mindat Formula:
KNa3Cu2(C2O4)4
Crystallography of Antipinite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 7.1574(5) Å, b = 10.7099(8) Å, c = 11.1320(8) Å
α = 113.093(1)°, β = 101.294(1)°, γ = 90.335(1)°
α = 113.093(1)°, β = 101.294(1)°, γ = 90.335(1)°
Ratio:
a:b:c = 0.668 : 1 : 1.039
Unit Cell V:
766.51 ų
Z:
2
Morphology:
Imperfect, short prismatic crystals up to 0.1 mm × 0.1 mm × 0.15 mm in size; in clusters and random aggregates.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.22 Å | (40) |
| 3.47 Å | (100) |
| 3.39 Å | (80) |
| 3.01 Å | (30) |
| 2.86 Å | (30) |
| 2.543 Å | (40) |
| 2.481 Å | (30) |
| 2.315 Å | (30) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 52 : Guano- and urine-derived minerals | <0.4 |
| 53 : Other minerals with taphonomic origins | <0.4 |
Type Occurrence of Antipinite
General Appearance of Type Material:
Antipinite forms imperfect, isometric and short prismatic crystals up to 0.1 mm × 0.1 mm × 0.15mm in size, as well as their random aggregates up to 0.6mm across
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Technische Universita¨t, Bergakademie Freiberg, Germany, inventory number 83870
Geological Setting of Type Material:
Guano deposit on chalcopyrite bearing gabbro
Associated Minerals at Type Locality:
Reference:
Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Lyssenko, K.A., Belakovskiy, D.I., Färber, G., Möhn, G., Van, K.V. (2015) Antipinite, KNa3Cu2(C2O4)4, a new mineral species from a guano deposit at Pabellón de Pica, Chile. Mineralogical Magazine: 79: 1111-1121.
Synonyms of Antipinite
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Antipinite associated with Joanneumite | Cu(C3N3O3H2)2(NH3)2 |
| 2 photos of Antipinite associated with Davidbrownite-(NH4) | (NH4)5(V4+O)2(C2O4)[PO2.75(OH)1.25]4 · 3H2O |
Fluorescence of Antipinite
none
Other Information
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 Antipinite
mindat.org URL:
https://www.mindat.org/min-46162.html
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Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Antipinite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2014) New minerals and nomenclature modifications approved in 2014, CNMNC Newsletter No 21. Mineralogical Magazine, 78 (4) 797-804 doi:10.1180/minmag.2014.078.4.03
Chukanov, Nikita V., Aksenov, Sergey M., Rastsvetaeva, Ramiza K., Lyssenko, Konstantin A., Belakovskiy, Dmitriy I., Färber, Gunnar, Möhn, Gerhard, Van, Konstantin V. (2015) Antipinite, KNa3Cu2(C2O4)4, a new mineral species from a guano deposit at Pabellón de Pica, Chile. Mineralogical Magazine, 79 (5) 1111-1121 doi:10.1180/minmag.2015.079.5.07
Localities for Antipinite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Chile (TL) | |
| Mineralogical Magazine +2 other references |
USA | |
| Kampf et al. (2019) |
| Kampf et al. (2019) |
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Pabellón de Pica, Chanabaya, Iquique Province, Tarapacá, Chile