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Bokite

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Balasauskandyk V Deposit, Karatau Range, Southern Kazakhstan Province (Ongtüstik Qazaqstan Oblysy; Yuzhno-Kazakhstanskaya Oblast'), Kazakhstan
© Pavel M. Kartashov

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Formula:
(Al,Fe
3+
 
)
 
1.3
(V
5+
 
,V
4+
 
,Fe
3+
 
)
 
8
O
 
20
 · 7.4H
 
2
O
System:MonoclinicColour:Black
Lustre:Sub-Metallic, DullHardness:3
Member of:Straczekite Group
Name:For Ivan Ivanovich Boka, Kazakh geologist.
This page provides mineralogical data about Bokite.

Classification of Bokite

IMA status:Approved
Strunz 8th edition ID:4/G.11-20
Nickel-Strunz 10th (pending) edition ID:4.HE.20

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
Dana 8th edition ID:47.3.2.5

47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
Hey's CIM Ref.:21.4.25

21 : Vanadates (and vanadates with arsenate or phosphate)
4 : Vanadates of U, Mn, Fe or Ni
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Type Occurrence of Bokite

Co-type Localities:Kurumsak V Deposit, Aksumbe, Karatau Range, Southern Kazakhstan Province (Ongtüstik Qazaqstan Oblysy; Yuzhno-Kazakhstanskaya Oblast'), Kazakhstan
Balasauskandyk V Deposit, Karatau Range, Southern Kazakhstan Province (Ongtüstik Qazaqstan Oblysy; Yuzhno-Kazakhstanskaya Oblast'), Kazakhstan
Place of Conservation of Type Material:National Museum of Natural History, Washington, D.C., USA (No. 139767)
Geological Setting of type material:In carbonaceous vanadiferous shales
Associated Minerals at type locality:
KazakhstaniteJarosite

Occurrences of Bokite

Geological Setting:As a constituent of U-V ores in triassic stream channels and impregnating sandstone

Physical Properties of Bokite

Lustre:Sub-Metallic, Dull
Diaphaneity (Transparency):Opaque
Colour:Black
Streak:Black, may be brownish black
Hardness (Mohs):3
Cleavage:Perfect
parallel to elongation; fair, perpendicular to first direction
Density (measured):2.97 - 3.1 g/cm3
Density (calculated):3.41 g/cm3

Crystallography of Bokite

Crystal System:Monoclinic
Cell Parameters:a = 11.838Å, b = 3.643Å, c = 11.142Å
β = 110.58°
Ratio:a:b:c = 3.25 : 1 : 3.058
Unit Cell Volume:V 449.84 ų (Calculated from Unit Cell)
Z:1
Morphology:Platy to columnar or wedge-shaped grains, to 0.3 mm; reniform crusts with radiating structure; also in veinlets
X-Ray Powder Diffraction:
d-spacingIntensity
10.47 (100)
3.452 (30)
2.907 (12)
2.592 (12)
1.8208 (11)
3.177 (9)
2.760 (9)
Comments:Recorded on material from the Kurumsak deposit, Kazakhstan

Optical Data of Bokite

Type:Biaxial
RI values: nα = 2.010 nγ = 2.060
Maximum Birefringence:δ = 0.050

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Type:Anisotropic
Anisotropism:Strong, brownish yellow to grey-blue
Dispersion:Relatively weak
Colour in reflected light:Light grey
Pleochroism:Strong
Comments:Dirty olive-green to deep reddish brown

Chemical Properties of Bokite

Formula:
(Al,Fe
3+
 
)
 
1.3
(V
5+
 
,V
4+
 
,Fe
3+
 
)
 
8
O
 
20
 · 7.4H
 
2
O
Essential elements:Al, H, O, V
All elements listed in formula:Al, Fe, H, O, V
Analytical Data:Chemical analyses of two samples from the Kurumsak deposit, Kazakhstan; empirical formula calculated from the values given in column (1)
         (1)      (2)

V2O5   (50.30)  (49.70)
V2O4   (14.10)  (14.00)
Al2O3   (3.90)   (4.40)
Fe2O3  (15.30)  (15.40)
K2O       -      (1.50)
H2O+    (7.70)   (7.80)
H2O-    (6.60)   (6.60)
SO3       -      (0.60)

sum     97.90   100.00 wt.-%
Empirical Formula:
(Al
 
0.72
Fe
 
0.60
)
 
=1.32
(V
 
6.80
Fe
 
1.20
)
 
=8.00
O
 
20
 · 7.46H
 
2
O

Relationship of Bokite to other Species

Member of:Straczekite Group
Other Members of Group:

- +
Bariandite
Al
 
0.6
(V
5+
 
,V
4+
 
)
 
8
O
 
20
 · 9H
 
2
O
Corvusite
(Na,K,Ca,Mg)
 
2
(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
8
O
 
20
 · 6-10H
 
2
O
Fernandinite
(Ca,K)(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
8
O
 
20
 · 10H
 
2
O
Straczekite
(Ca,K,Ba)(V
5+
 
,V
4+
 
)
 
8
O
 
20
 · 3H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
4.HE.05Melanovanadite
Ca(V
5+
 
,V
4+
 
)
 
4
O
 
10
 · 5H
 
2
O
4.HE.10Shcherbinaite
V
5+
2
O
 
5
4.HE.15Hewettite
CaV
 
6
O
 
16
 · 9H
 
2
O
4.HE.15Metahewettite
CaV
 
6
O
 
16
 · 3H
 
2
O
4.HE.20Bariandite
Al
 
0.6
(V
5+
 
,V
4+
 
)
 
8
O
 
20
 · 9H
 
2
O
4.HE.20Corvusite
(Na,K,Ca,Mg)
 
2
(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
8
O
 
20
 · 6-10H
 
2
O
4.HE.20Fernandinite
(Ca,K)(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
8
O
 
20
 · 10H
 
2
O
4.HE.20Straczekite
(Ca,K,Ba)(V
5+
 
,V
4+
 
)
 
8
O
 
20
 · 3H
 
2
O
4.HE.25Häggite
V
3+
 
V
4+
 
O
 
2
(OH)
 
3
4.HE.30Doloresite
V
4+
3
O
 
4
(OH)
 
4
4.HE.35Duttonite
V
4+
 
O(OH)
 
2
4.HE.40Cavoite
CaV
4+
3
O
 
7
Related Minerals - Hey's Index Grouping:

- +
21.4.1Uvanite
U
6+
2
V
5+
6
O
 
21
 · 15H
 
2
O (?)
21.4.2Vanuranylite
(H
 
3
O)
 
2
(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 4H
 
2
O
21.4.3Strelkinite
Na
 
2
(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 6H
 
2
O
21.4.4Carnotite
K
 
2
(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 3H
 
2
O
21.4.5Margaritasite
(Cs,K,H
 
3
O)
 
2
(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · H
 
2
O
21.4.6Sengierite
Cu
 
2
(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 6H
 
2
O
21.4.7Metatyuyamunite
Ca(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 3-5H
 
2
O
21.4.8Tyuyamunite
Ca(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 5-8H
 
2
O
21.4.9Rauvite
Ca(UO
 
2
)
 
2
(V
 
10
O
 
28
) · 16H
 
2
O
21.4.10Francevillite
(Ba,Pb)(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 5H
 
2
O
21.4.11Metavanuralite
Al(UO
 
2
)
 
2
(VO
 
4
)
 
2
(OH) · 8H
 
2
O
21.4.12Vanuralite
Al(UO
 
2
)
 
2
(VO
 
4
)
 
2
(OH) · 11H
 
2
O
21.4.13Curienite
Pb(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 5H
 
2
O
21.4.14Fritzscheite
Mn(UO
 
2
)
 
2
(PO
 
4
,VO
 
4
)
 
2
 · 10H
 
2
O (?)
21.4.15Palenzonaite
(Ca,Na)
 
3
CaMn
2+
2
(VO
 
4
)
 
3
21.4.16Santafeite
(Na,Ca,Sr)
 
12
(Mn
2+
 
,Fe
3+
 
,Al,Mg)
 
8
Mn
4+
8
(VO
 
4
)
 
16
(OH,O)
 
20
 · 8H
 
2
O
21.4.17Pyrobelonite
PbMn
2+
 
(VO
 
4
)(OH)
21.4.18Brackebuschite
Pb
 
2
(Mn
3+
 
,Fe
3+
 
)(VO
 
4
)
 
2
(OH)
21.4.19Čechite
Pb(Fe
2+
 
,Mn
2+
 
)(VO
 
4
)(OH)
21.4.20Heyite
Pb
 
5
Fe
2+
2
(VO
 
4
)
 
2
O
 
4
21.4.21Mounanaite
PbFe
3+
2
(VO
 
4
)
 
2
 · 2(OH,F)
21.4.22Schubnelite
Fe
3+
 
VO
 
4
 · H
 
2
O
21.4.23Fervanite
Fe
3+
4
V
5+
4
O
 
16
 · 5H
 
2
O
21.4.24Kazakhstanite
Fe
3+
5
V
4+
3
V
5+
12
O
 
39
(OH)
 
9
 · 9H
 
2
O
21.4.26Rusakovite
(Fe
3+
 
,Al)
 
5
(VO
 
4
,PO
 
4
)
 
2
(OH)
 
9
 · 3H
 
2
O
21.4.27Kolovratite
Ni
 
x
Zn
 
y
(VO
 
4
)
 
0.67(x+y)
 · nH
 
2
O

Other Names for Bokite

Other Languages:
German:Bokit
Spanish:Bokita

Other Information

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 Bokite

Reference List:

- +
Ankinovich, E. A. (1963): A new vanadium mineral - bokite. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva 92, 51-59 (in Russian). - American Mineralogist 48, 1180-1181 (abstract).

Evans, Jr., H.T., and Hughes, J.M. (1990): Crystal chemistry of the natural vanadium bronzes. American Mineralogist 75, 508-521.

Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 71.

Internet Links for Bokite

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    • Localities for Bokite

    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.
    Hide Locality List
    (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.
    Kazakhstan
     
    • Southern Kazakhstan Province (Ongtüstik Qazaqstan Oblysy; Yuzhno-Kazakhstanskaya Oblast')
      • Karatau Range
        • Aksumbe
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    ZVMO,(1963) 92, 51-59; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
        • Ran River valley
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    • Zhambyl Province (Jambyl Oblysy; Dzhambulskaya Oblast')
      • Talas Alatau Range (Talas Ala-Too Range)
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    USA
     
    • Arizona
      • Apache Co.
        • Navajo Indian Reservation
          • Monument Valley
            • Monument No. 2 channel
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 140; Haynes, P. (1991), Arizona news, Min.News: Jan: 9.
    • Arkansas
      • Garland Co.
        • Wilson Springs (Potash Sulfur Springs)
          • Union Carbide Mine
    		R&M 70:3 pp 154-170
    • Nevada
      • Eureka Co.
        • Gibellini District
    		Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 71
          • Fish Creek Range
    		American Mineralogist (1979), 64:713-720
    NBMG Spec. Pub. 31 Minerals of Nevada
    Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 43
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