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Antipinite

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About AntipiniteHide

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 (1951–2013), a specialist in the crystallography and crystal chemistry of organometallic and coordination compounds. He was awarded the Prize of the Russian Academy of Sciences for these investigations.
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.


Classification of AntipiniteHide

Approved
Approval Year:
2014
10.00.

10 : ORGANIC COMPOUNDS
0 :
0 :

Physical Properties of AntipiniteHide

Vitreous
Transparency:
Translucent
Colour:
Blue
Comment:
pale blue, almost white
Hardness:
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
in three directions
Density:
2.53(3) g/cm3 (Measured)    2.549 g/cm3 (Calculated)

Optical Data of AntipiniteHide

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.
Surface Relief:
Low
Bireflectance:
strong, r < v
Pleochroism:
Strong
Comments:
blue on Z, light blue on Y, colourless on X;

Chemical Properties of AntipiniteHide

Formula:
KNa3Cu2(C2O4)4

Crystallography of AntipiniteHide

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)°
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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.22(40)
3.47(100)
3.39(80)
3.01(30)
2.86(30)
2.543(40)
2.481(30)
2.315(30)
Comments:
From Type Description.

Type Occurrence of AntipiniteHide

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:

Synonyms of AntipiniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Joanneumite2 photos of Antipinite associated with Joanneumite on mindat.org.

Fluorescence of AntipiniteHide

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.

References for AntipiniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Lysenko, K.A., Belakovskiy, D.I., Färber, G. and Van, K.V. (2014) Antipinite, IMA 2014-027. CNMNC Newsletter No. 21, August 2014, page 801; Mineralogical Magazine, 78, 797-804.
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.

Internet Links for AntipiniteHide

Localities for AntipiniteHide

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.
Chile (TL)
 
  • Tarapacá Region
    • Iquique Province
      • Chanabaya
Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Lysenko, K.A., Belakovskiy, D.I., Färber, G. and Van, K.V. (2014) Antipinite, IMA 2014-027. CNMNC Newsletter No. 21, August 2014, page 801; Mineralogical Magazine, 78, 797-804.; 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.
Mineral and/or Locality  
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