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Starovaite

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Formula:
KCu
 
5
O(VO
 
4
)
 
3
System:TriclinicColour:Golden brown to reddish ...
Hardness:3½ - 4
Name:After Galina Leonidovna Starova (b. 1946) Russian crystallographer and crystal chemist, associate professor of the Chemical Faculty of St. Petersburg State University, a specialist in single-crystal X-ray diffraction analysis, for her contribution to the crystal chemistry of minerals from the Tolbachik fumaroles.
This page provides mineralogical data about Starovaite.

Classification of Starovaite

IMA status:Approved 2011
mindat.org URL:http://www.mindat.org/min-42872.html
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Type Occurrence of Starovaite

Type Locality:Yadovitaya fumarole, Second scoria cone, Northern Breakthrough (North Breach), Great Fissure eruption (Main Fracture), Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia
General Appearance of Type Material:Prismatic crystals up to 3 x 6 x 20 µm or divergent long-prismatic crystals up to 1 x 3 x 70 µm. The crystals are combined in sprays, sheaf-like aggregates or crusts up to 0.3 x 0.5 mm overgrowing lammerite.
Place of Conservation of Type Material:Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4196/1
Year of Discovery:2011
Geological Setting of type material:In the sublimates of a fumarole.
Associated Minerals at type locality:
LammeriteHematitePalmieriteTenoritePiypite
RutileOrthoclaseLyonsitePseudolyonsiteLangbeinite
CalciolangbeiniteCupromolybditeLammerite-β

Physical Properties of Starovaite

Lustre:Sub-Metallic
Colour:Golden brown to reddish brown
Streak:Yellowish brown
Hardness (Mohs):3½ - 4
Hardness (Vickers):VHN20=165 - 195 kg/mm2
Tenacity:Brittle
Cleavage:None Observed
Parting:None observed
Fracture:Irregular/Uneven
Density (calculated):4.54 g/cm3

Crystallography of Starovaite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Space Group Setting:P1
Cell Parameters:a = 6.08(4) Å, b = 8.26(5) Å, c = 10.71(6) Å
α = 97.8(1)°, β = 92.4(1)°, γ = 90.4(1)°
Ratio:a:b:c = 0.736 : 1 : 1.297
Unit Cell Volume:V 532 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
10.65(32)
8.18(46)
3.047(41)
2.745(47)
2.526(100)
2.322(98)
1.867(25)
1.410(23)

Optical Data of Starovaite

Type:Anisotropic
Anisotropism:Weak
Bireflectance:Weak
1.5
Reflectivity:
400nmR1=15.8%R2= 14.6%
420nmR1=15.2%R2= 13.8%
440nmR1=14.8%R2= 13.1%
460nmR1=14.4%R2= 12.6%
480nmR1=14.0%R2= 12.3%
500nmR1=13.7%R2= 12.0%
520nmR1=13.5%R2= 11.8%
540nmR1=13.3%R2= 11.6%
560nmR1=13.1%R2= 11.5%
580nmR1=13.0%R2= 11.4%
600nmR1=12.9%R2= 11.4%
620nmR1=12.8%R2= 11.3%
640nmR1=12.7%R2= 11.3%
660nmR1=12.5%R2= 11.2%
680nmR1=12.4%R2= 11.2%
700nmR1=12.3%R2= 11.1%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 15.8%.
R1 shown in black, R2 shown in red
Colour in reflected light:Grey with a brownish hue
Internal Reflections:Distinct red-brown
Pleochroism:Non-pleochroic

Chemical Properties of Starovaite

Formula:
KCu
 
5
O(VO
 
4
)
 
3
Simplified for copy/paste:KCu5O(VO4)3
Essential elements:Cu, K, O, V
All elements listed in formula:Cu, K, O, V
Analytical Data:Average of 8 electron-microprobe analyses. Sample from the type locality.
K2O (4.90)
CaO (0.04)
PbO (1.29)
CuO (48.20)
ZnO (5.59)
Al2O3 (0.08)
Fe2O3 (0.10)
P2O5 (0.05)
As2O5 (4.49)
V2O5 (31.89)
SO3 (0.19)
MoO3 (2.34)
Total (99.16)
Empirical Formula:
(K
 
0.76
Pb
 
0.04
Ca
 
0.01
)(Cu
 
4.45
Zn
 
0.51
Al
 
0.01
Fe
 
0.01
)(V
 
2.58
As
 
0.29
Mo
 
0.12
S
 
0.02
P
 
0.01
)O
 
13

Other Names for Starovaite

Synonyms:
IMA2011-085
Other Languages:

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 Starovaite

Reference List:

- +
Pekov, I.V., Zelenski, M.E.,Yapaskurt, V.O., Polekhovsky, Y.S. and Murashko, M.N. (2012): Starovaite, IMA 2011- 085. CNMNC Newsletter No. 12, February 2012, page 153; Mineralogical Magazine, 76, 151-155.

Pekov, I.V., Zelenski, M.E., Yapaskurt, V.O., Polekhovsky, Y.S. and Murashko, M.N. (2013): Starovaite, KCu5O(VO4)3, a new mineral from fumarole sublimates of the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 25, 91-96.

Internet Links for Starovaite

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  • Localities for Starovaite

    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.
    Russia
     
    • Far-Eastern Region
      • Kamchatka Oblast'
        • Tolbachik volcano
          • Great Fissure eruption (Main Fracture)
            • Northern Breakthrough (North Breach)
              • Second scoria cone
    Pekov, I.V., Zelenski, M.E.,Yapaskurt, V.O., Polekhovsky, Y.S. and Murashko, M.N. (2012): Starovaite, IMA 2011- 085. CNMNC Newsletter No. 12, February 2012, page 153; Mineralogical Magazine, 76, 151-155.
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