Bokite (original) (raw)

A valid IMA mineral species

About BokiteHide

This section is currently hidden. Click the show button to view.

Formula:

(Al,Fe)1.3(V5+,V4+,Fe3+)8O20 · 7.5H2O

Lustre:

Sub-Metallic, Dull

Specific Gravity:

2.97 - 3.1

Crystal System:

Monoclinic

Name:

Named in 1963 by E.A. Ankinovich in honor of Ivan Ivanovich Bok (Иван Иванович Бок) (10 October 1898, Belebey, Bashkortostan, Russian Empire - 30 September 1983, Leningrad, USSR), geologist, Institute of Geosciences, Alma-Ata, Kazakhstan and instructor, Sverdlovsk Mining Institute (then Kazakhstan Mining and Metallurgical Institute).

Unique IdentifiersHide

This section is currently hidden. Click the show button to view.

Long-form identifier:

mindat:1:1:709:0

7c3f2341-435c-4016-a94b-d68198a42b64

IMA Classification of BokiteHide

This section is currently hidden. Click the show button to view.

Type description reference:

Classification of BokiteHide

This section is currently hidden. Click the show button to view.

4.HE.20

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

47.3.2.5

47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts

21.4.25

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

Mineral SymbolsHide

This section is currently hidden. Click the show button to view.

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of BokiteHide

This section is currently hidden. Click the show button to view.

Streak:

Black, may be brownish black

Cleavage:

Perfect
parallel to elongation; fair, perpendicular to first direction

Density:

2.97 - 3.1 g/cm3 (Measured) 3.41 g/cm3 (Calculated)

Optical Data of BokiteHide

This section is currently hidden. Click the show button to view.

RI values:

_n_α = 2.010 _n_γ = 2.060

δ = 0.050

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Anisotropism:

Strong, brownish yellow to grey-blue

Dispersion:

Relatively weak

Colour in reflected light:

Light grey

Comments:

Dirty olive-green to deep reddish brown

Chemistry of BokiteHide

This section is currently hidden. Click the show button to view.

Mindat Formula:

(Al,Fe)1.3(V5+,V4+,Fe3+)8O20 · 7.5H2O

Crystallography of BokiteHide

This section is currently hidden. Click the show button to view.

Crystal System:

Monoclinic

Cell Parameters:

a = 11.838(5) Å, b = 3.643(1) Å, c = 11.142(5) Å
β = 110.58(4)°

Ratio:

a:b:c = 3.25 : 1 : 3.058

Unit Cell V:

449.84 ų (Calculated from Unit Cell)

Morphology:

Platy to columnar or wedge-shaped grains, to 0.3 mm; reniform crusts with radiating structure; also in veinlets.

Comment:

Point Group: n.d.; Space Group: n.d.

X-Ray Powder DiffractionHide

This section is currently hidden. Click the show button to view.

Powder Diffraction Data:

Comments:

Recorded on material from the Kurumsak deposit, Kazakhstan

Geological EnvironmentHide

This section is currently hidden. Click the show button to view.

Geological Setting:

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

Type Occurrence of BokiteHide

This section is currently hidden. Click the show button to view.

General Appearance of Type Material:

Platy to columnar or wedge-shaped grains, to 0.3 mm long,

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:

Reference:

Ankinovich, E.A. (1963) A new vanadium mineral - bokite. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 92: 51-59.

Other Language Names for BokiteHide

This section is currently hidden. Click the show button to view.

Relationship of Bokite to other SpeciesHide

This section is currently hidden. Click the show button to view.

Other Members of this group:

Common AssociatesHide

This section is currently hidden. Click the show button to view.

Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

This section is currently hidden. Click the show button to view.

Other InformationHide

This section is currently hidden. Click the show button to view.

Thermal Behaviour:

Melts at 950 C.

Notes:

Slightly soluble in cold acids with the formation of a pale green solution, dissolves completely in 40% KOH or NaOH. Heated in the closed tube it gives off acid water.

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 BokiteHide

This section is currently hidden. Click the show button to view.

References for BokiteHide

This section is currently hidden. Click the show button to view.

Reference List:

**Anthony, John Williams, Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. - Ed. (1997) Handbook of Mineralogy Vol. 3 - Halides, Hydroxides, Oxides. Mineral Data Publishing, Tucson, Arizona. p.1-682.**pp.71-71

Localities for BokiteHide

This section is currently hidden. Click the show button to view.

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 section is currently hidden. Click the show button to view.

- 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.