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Bluestreakite

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Formula:
K4Mg2(V4+2V5+8O28) · 14H2O
Colour:
Dark greenish blue
Lustre:
Sub-Adamantine
Hardness:
2
Specific Gravity:
2.630 (Calculated)
Crystal System:
Monoclinic
Name:
For the type locality, the Blue Streak mine.
New structure type.
The mineral forms from the oxidation of montroseite-corvusite assemblages in a moist environment.


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Classification of BluestreakiteHide

Approved
Approval Year:
2014

Pronounciation of BluestreakiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of BluestreakiteHide

Sub-Adamantine
Transparency:
Transparent
Colour:
Dark greenish blue
Streak:
Light blue
Hardness:
Hardness Data:
Estimated
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.630 g/cm3 (Calculated)
Comment:
Based on the empirical formula and single-crystal cell data

Optical Data of BluestreakiteHide

Type:
Biaxial (-)
RI values:
nα = 1.750(5) nβ = 1.800(5) nγ = 1.829
2V:
Measured: 73°
Max Birefringence:
δ = 0.079
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Weak
Comments:
slight, with X < Y ≈ Z dark greenish blue.

Chemical Properties of BluestreakiteHide

Formula:
K4Mg2(V4+2V5+8O28) · 14H2O

Crystallography of BluestreakiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 12.2383(7) Å, b = 10.3834(4) Å, c = 14.1945(6) Å
β = 103.008(2)°
Ratio:
a:b:c = 1.179 : 1 : 1.367
Unit Cell V:
1757.48 ų
Z:
2
Morphology:
Irregular polycrystalline coatings; Rarely as tablets or blades
Comment:
P21/n

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.34(57)
8.27(100)
7.90(21)
3.162(14)
2.781(15)
2.266(16)
1.9814(22)
1.7354(15)

Type Occurrence of BluestreakiteHide

General Appearance of Type Material:
Irregular polycrystalline coatings on rounded quartz grains or masses of montroseite.
Place of Conservation of Type Material:
Cotype material is deposited in the collections of the Natural History Museum of Los Angeles County,USA, catalogue numbers 64174 and 64175
Geological Setting of Type Material:
On corvusite-montroseite-bearing sandstone blocks
Associated Minerals at Type Locality:

Synonyms of BluestreakiteHide

Fluorescence of BluestreakiteHide

Does not fluoresce in short- or long-wave ultraviolet radiation

Other InformationHide

Notes:
Slowly soluble in H2O (days) and easily soluble in dilute HCl with immediate loss of color.
Special Storage/
Display Requirements:
Slowly soluble in H2O (days)
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 BluestreakiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A. R., Hughes, J. M., Nash, B. P., Marty, J., Chen, Y-S, and Steele, I. M., 2014. Bluestreakite, K4Mg2(V4+2V5+8O28) ·14H2O. New mineral approved by the Commission on New Minerals, Nomenclature and Classification (CNMNC) of the International Mineralogical Association (IMA) IMA No. 2014–047.
Kampf, A.R., Hughes, J.M., Marty,J., Nash, B.P., Chen, Y.-S. and Steele, I.M.
(2014) Bluestreakite, IMA 2014-047. CNMNC Newsletter No. 22, October 2014, page 1244; Mineralogical Magazine, 78, 1241-1248.
Kampf, A.R., Hughes, J.M., Marty, J., Nash, B.P., Chen, Yu-S., Steele, I.M. (2014) Bluestreakite, K4Mg2(V4+2V5+8O28)·14H2O, a new mixed-valence decavanadate mineral from the Bluestreak Mine, Montrose County, Colorado: crystal structure and descriptive mineralogy. Canadian Mineralogist. 52:1007-1018

Internet Links for BluestreakiteHide

Localities for BluestreakiteHide

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.
USA (TL)
 
  • Colorado
    • Montrose Co.
      • Bull Canyon District
Kampf, A.R., Hughes, J.M., Marty, J., Nash, B.P., Chen, Yu-S., Steele, I.M. (2014) Bluestreakite, K4Mg2(V4+2V5+8O28)·14H2O, a new mixed-valence decavanadate mineral from the Bluestreak Mine, Montrose County, Colorado: crystal structure and descriptive mineralogy. Canadian Mineralogist. 52:1007-1018
Mineral and/or Locality  
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