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Chistyakovaite

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Formula:
Al(UO2)2(AsO4)2(F,OH) · 6.5H2O
System:
Monoclinic
Colour:
Yellow
Hardness:
Name:
Named for N. I. Chistyakova, specialist in the field of x-ray spectral analysis, senior assistant at the All-Russia
Research Institute of Mineral Resources (VIMS)
Isostructural with Threadgoldite

Classification of Chistyakovaite

Approved 2005
8.EB.20

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
Dana 7th ed.:
42.11.15.4
mindat.org URL:
http://www.mindat.org/min-27416.html
Please feel free to link to this page.

First Recorded Occurrence of Chistyakovaite

General Appearance of First Recorded Material:
Imperfect, flattened crystals to 2 mm across; sometimes intergrown
Place of Conservation of First Recorded Material:
E. V. Kopchenova collection of the Mineralogical Museum at VIMS (no. 350/59)
Fersman Mineralogical Museum, Moscow (no. 3286/1)
Geological Setting of First Recorded Material:
Hydrothermal Uranium deposit, consisting of carbonatized felsite porphyries and tuffaceous breccias of Devonian age that underwent primary hydrothermal and subsequent supergene alteration.

Physical Properties of Chistyakovaite

Diaphaneity (Transparency):
Transparent
Colour:
Yellow
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
Perfect
on {100}, imperfect on {001}
Fracture:
Step-Like
Density:
3.62 g/cm3 (Measured)    3.585 g/cm3 (Calculated)

Crystallography of Chistyakovaite

Crystal System:
Monoclinic
Cell Parameters:
a = 19.99Å, b = 9.79Å, c = 19.62Å
β = 110.7°
Ratio:
a:b:c = 2.042 : 1 : 2.004
Unit Cell Volume:
V 3,591.80 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Crystals flattened on {100}

Optical Data of Chistyakovaite

Type:
Biaxial (-)
RI values:
nα = 1.557 nβ = 1.580 nγ = 1.580
2V:
Measured: -10°
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
None

Chemical Properties of Chistyakovaite

Formula:
Al(UO2)2(AsO4)2(F,OH) · 6.5H2O
Essential elements:
All elements listed in formula:
Analytical Data:
Results from electron microprobe analysis (F: 15 kV, 70 nA, 50-60 µm electron-beam; all others: 20 kV, 10 nA, 50 μm electron-beam); water content from weight loss observed by heating to 850 °C in an Ar atmosphere.
Empirical formula calculated on the basis of two arsenate (or, phosphate) anions per formula unit.
Al2O3   (4.99)
UO3    (58.34)
As2O5  (21.40)
P2O5    (1.23)
F       (1.1)
H2O    (12.2)
O = F  (–0.46)

sum     98.80 wt.-%
Empirical Formula:
Al0.96(UO2)2.00[{F0.57(OH)0.31}|{(AsO4)1.83(PO4)0.17}] · 6.50H2O

Relationship of Chistyakovaite to other Species

8.EB.05AutuniteCa(UO2)2(PO4)2 · 11H2O
8.EB.05HeinrichiteBa(UO2)2(AsO4)2 · 10H2O
8.EB.05KahleriteFe(UO2)2(AsO4)2 · 12H2O
8.EB.05Nováčekite-IMg(UO2)2(AsO4)2 · 12H2O
8.EB.05SaléeiteMg(UO2)2(PO4)2 · 10H2O
8.EB.05TorberniteCu(UO2)2(PO4)2 · 12H2O
8.EB.05UranocirciteBa(UO2)2(PO4)2 · 10H2O
8.EB.05UranospiniteCa(UO2)(AsO4)2 · 10H2O
8.EB.05Xiangjiangite(Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2O
8.EB.05ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
8.EB.05MetarauchiteNi(UO2)2(AsO4)2 · 8H2O
8.EB.05RauchiteNi(UO2)2(AsO4)2 · 10H2O
8.EB.10BassetiteFe2+(UO2)2(PO4)2 · 8H2O
8.EB.10LehneriteMn2+(UO2)2(PO4)2 · 8H2O
8.EB.10Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
8.EB.10MetasaléeiteMg(UO2)2(PO4)2 · 8H2O
8.EB.10Metauranocircite-IBa(UO2)2(PO4)2 · 7H2O
8.EB.10MetauranospiniteCa(UO2)2(AsO4)2 · 8H2O
8.EB.10MetaheinrichiteBa(UO2)2(AsO4)2 · 8H2O
8.EB.10MetakahleriteFe2+(UO2)2(AsO4)2 · 8H2O
8.EB.10MetakirchheimeriteCo(UO2)2(AsO4)2 · 8H2O
8.EB.10MetanováčekiteMg(UO2)2(AsO4)2 · 4-8H2O
8.EB.10MetatorberniteCu(UO2)2(PO4)2 · 8H2O
8.EB.10MetazeuneriteCu(UO2)2(AsO4)2 · 8H2O
8.EB.10PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2O
8.EB.10Meta-lodèvite
8.EB.15AbernathyiteK2(UO2)2(AsO4)2 · 6H2O
8.EB.15Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2O
8.EB.15Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
8.EB.15Natrouranospinite(Na2,Ca)(UO2)2(AsO4)2 · 5H2O
8.EB.15Trögerite(UO2)3(AsO4)2 · 12H2O (?)
8.EB.15Uramphite(NH4)2(UO2)2(PO4)2 · 6H2O
8.EB.15Uramarsite(NH4,H3O)2(UO2)2(AsO4,PO4)2 · 6H2O
8.EB.20ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2O
8.EB.25ArsenuranospathiteHAl(UO2)4(AsO4)4 · 40H2O
8.EB.25Uranospathite(Al,☐)(UO2)2(PO4)2F · 20(H2O,F)
8.EB.30Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2O
8.EB.35CoconinoiteFe23+Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2O
8.EB.40RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2O
8.EB.45TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2O
8.EB.50FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2O
8.EB.55SabugaliteHAl(UO2)4(PO4)4 · 16H2O
42.11.15.1VanuraliteAl(UO2)2(VO4)2(OH) · 11H2O
42.11.15.2MetavanuraliteAl(UO2)2(VO4)2(OH) · 8H2O
42.11.15.3ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2O

Other Names for Chistyakovaite

Name in Other Languages:
Simplified Chinese:水砷铝铀石

Other Information

Bright green when excited at 365 nm ("long-wave" UV)
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 Chistyakovaite

Reference List:
Chukanov, N. V., Sidorenko, G. A., Naumova, I. S., Zadov, A. E., Kuz’min, V. I. (2006): Chistyakovaite, a new mineral Al(UO2)2(AsO4)2(F,OH)·6.5H2O. Transactions (Doklady) of the Russian Academy of Sciences/Earth Science Section 407, 290-293 (in English). - Dokl. Akad. Nauk 406, 816–819 (in Russian).

Internet Links for Chistyakovaite

Localities for Chistyakovaite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Menzenschwand
Chukanov, N. V., Sidorenko, G. A., Naumova, I. S., Zadov, A. E., Kuz’min, V. I. (2006): Chistyakovaite, a new mineral Al(UO2)2(AsO4)2(F,OH)·6.5H2O. Transactions (Doklady) of the Russian Academy of Sciences/Earth Science Section 407, 290-293
Kazakhstan
 
  • Almaty Province (Almaty Oblysy; Almati Oblast')
    • Lake Alakol (Lake Aaköl)
Chukanov, N. V., Sidorenko, G. A., Naumova, I. S., Zadov, A. E., Kuz’min, V. I. (2006): Chistyakovaite, a new mineral Al(UO2)2(AsO4)2(F,OH)·6.5H2O. Transactions (Doklady) of the Russian Academy of Sciences/Earth Science Section 407, 290-293
Mineral and/or Locality  
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