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Chistyakovaite

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Formula:
Al(UO
 
2
)
 
2
(AsO
 
4
)
 
2
(F,OH) · 6.5H
 
2
O
System:MonoclinicColour: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

IMA status:Approved 2005
Strunz 8th edition ID:7/E.05-45
Nickel-Strunz 10th (pending) edition ID:8.EB.20

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
Dana 7th edition ID:42.11.15.4
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Type Occurrence of Chistyakovaite

Type Locality:Bota-Burum U deposit, Lake Alakol (Lake Aaköl), Almaty Province (Almaty Oblysy; Almati Oblast'), Kazakhstan
General Appearance of Type Material:Imperfect, flattened crystals to 2 mm across; sometimes intergrown
Place of Conservation of Type Material:E. V. Kopchenova collection of the Mineralogical Museum at VIMS (no. 350/59)
Fersman Mineralogical Museum, Moscow (no. 3286/1)
Geological Setting of type material:Hydrothermal Uranium deposit, consisting of carbonatized felsite porphyries and tuffaceous breccias of Devonian age that underwent primary hydrothermal and subsequent supergene alteration.
Associated Minerals at type locality:
TrögeriteScoroditePyriteNatrouranospiniteMetazeunerite
GalenaArsenopyriteArseniosideriteArseniosiderite

Physical Properties of Chistyakovaite

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

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°
Maximum Birefringence:δ = 0.023

Chart 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(UO
 
2
)
 
2
(AsO
 
4
)
 
2
(F,OH) · 6.5H
 
2
O
Simplified for copy/paste:Al(UO2)2(AsO4)2(F,OH)·6.5H2O
Essential elements:Al, As, F, H, O, U
All elements listed in formula:Al, As, F, H, O, U
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:
Al
 
0.96
(UO
 
2
)
 
2.00
[{F
 
0.57
(OH)
 
0.31
}|{(AsO
 
4
)
 
1.83
(PO
 
4
)
 
0.17
}] · 6.50H
 
2
O

Relationship of Chistyakovaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.EB.05Autunite
Ca(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 11H
 
2
O
8.EB.05Heinrichite
Ba(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 10H
 
2
O
8.EB.05Kahlerite
Fe(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 12H
 
2
O
8.EB.05Nováčekite-I
Mg(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 12H
 
2
O
8.EB.05Saléeite
Mg(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 10H
 
2
O
8.EB.05Torbernite
Cu(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 12H
 
2
O
8.EB.05Uranocircite
Ba(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 10H
 
2
O
8.EB.05Uranospinite
Ca(UO
 
2
)(AsO
 
4
)
 
2
· 10H
 
2
O
8.EB.05Xiangjiangite
(Fe
3+
 
,Al)(UO
 
2
)
 
4
(PO
 
4
)
 
2
(SO
 
4
)
 
2
(OH) · 22H
 
2
O
8.EB.05Zeunerite
Cu(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 12H
 
2
O
8.EB.05Metarauchite
Ni(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 8H
 
2
O
8.EB.05Rauchite
Ni(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 10H
 
2
O
8.EB.10Bassetite
Fe
2+
 
(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 8H
 
2
O
8.EB.10Lehnerite
Mn
2+
 
(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 8H
 
2
O
8.EB.10Meta-autunite
Ca(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 6-8H
 
2
O
8.EB.10Metasaléeite
Mg(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 8H
 
2
O
8.EB.10Metauranocircite-I
Ba(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 7H
 
2
O
8.EB.10Metauranospinite
Ca(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 8H
 
2
O
8.EB.10Metaheinrichite
Ba(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 8H
 
2
O
8.EB.10Metakahlerite
Fe
2+
 
(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 8H
 
2
O
8.EB.10Metakirchheimerite
Co(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 8H
 
2
O
8.EB.10Metanováčekite
Mg(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 4-8H
 
2
O
8.EB.10Metatorbernite
Cu(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 8H
 
2
O
8.EB.10Metazeunerite
Cu(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 8H
 
2
O
8.EB.10Przhevalskite
Pb
 
2
(UO
 
2
)
 
3
(PO
 
4
)
 
2
(OH)
 
4
· 3H
 
2
O
8.EB.10Meta-lodèvite
8.EB.15Abernathyite
K
 
2
(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 6H
 
2
O
8.EB.15Chernikovite
(H
 
3
O)
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 6H
 
2
O
8.EB.15Meta-ankoleite
K
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 6H
 
2
O
8.EB.15Natrouranospinite
(Na
 
2
,Ca)(UO
 
2
)
 
2
(AsO
 
4
)
 
2
· 5H
 
2
O
8.EB.15Trögerite
(UO
 
2
)
 
3
(AsO
 
4
)
 
2
· 12H
 
2
O (?)
8.EB.15Uramphite
(NH
 
4
)
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
2
· 6H
 
2
O
8.EB.15Uramarsite
(NH
 
4
,H
 
3
O)
 
2
(UO
 
2
)
 
2
(AsO
 
4
,PO
 
4
)
 
2
· 6H
 
2
O
8.EB.20Threadgoldite
Al(UO
 
2
)
 
2
(PO
 
4
)
 
2
(OH) · 8H
 
2
O
8.EB.25Arsenuranospathite
HAl(UO
 
2
)
 
4
(AsO
 
4
)
 
4
· 40H
 
2
O
8.EB.25Uranospathite
(Al,☐)(UO
 
2
)
 
2
(PO
 
4
)
 
2
F · 20(H
 
2
O,F)
8.EB.30Vochtenite
(Fe
2+
 
,Mg)Fe
3+
 
(UO
 
2
)
 
4
(PO
 
4
)
 
4
(OH) · 12-13H
 
2
O
8.EB.35Coconinoite
Fe
3+
2
Al
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
4
(SO
 
4
)(OH)
 
2
· 20H
 
2
O
8.EB.40Ranunculite
HAl(UO
 
2
)(PO
 
4
)(OH)
 
3
· 4H
 
2
O
8.EB.45Triangulite
Al
 
3
(UO
 
2
)
 
4
(PO
 
4
)
 
4
(OH)
 
5
· 5H
 
2
O
8.EB.50Furongite
Al
 
13
(UO
 
2
)
 
7
(PO
 
4
)
 
13
(OH)
 
14
· 58H
 
2
O
8.EB.55Sabugalite
HAl(UO
 
2
)
 
4
(PO
 
4
)
 
4
· 16H
 
2
O
Related Minerals - Dana Grouping):

- +
42.11.15.1Vanuralite
Al(UO
 
2
)
 
2
(VO
 
4
)
 
2
(OH) · 11H
 
2
O
42.11.15.2Metavanuralite
Al(UO
 
2
)
 
2
(VO
 
4
)
 
2
(OH) · 8H
 
2
O
42.11.15.3Threadgoldite
Al(UO
 
2
)
 
2
(PO
 
4
)
 
2
(OH) · 8H
 
2
O

Other Names for Chistyakovaite

Synonyms:
IMA2005-003
Other Languages:
Simplified Chinese:水砷铝铀石

Other Information

Fluorescence in UV light:Bright green when excited at 365 nm ("long-wave" UV)
Health Warning: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

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Localities for Chistyakovaite

    The 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. ? 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
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