Vlasovite
A valid IMA mineral species
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About Vlasovite
Formula:
Na2ZrSi4O11
Colour:
Colorless, honey-brown
Lustre:
Vitreous, Greasy, Pearly
Hardness:
6
Specific Gravity:
2.92 - 2.97
Crystal System:
Monoclinic
Name:
Named in honor of Kuzma Alekseevich Vlasov (Кузьма Алексеевич Власов) (1 (14) November 1905, Nikolaevka, Tambov Province, Russian Empire - 29 September 1964, Moscow, USSR), mineralogist and geochemist, founder of the Institute of Mineralogy (Moscow).
Seems to be related to khurayyimite"; the two are suggesteed to belong to the same group.
The two minerals can be described using geometrical repeat unit of cTr = 2T4 3T4 and topological repeat unit of cVr = 2V2 3V2.
The two minerals can be described using geometrical repeat unit of cTr = 2T4 3T4 and topological repeat unit of cVr = 2V2 3V2.
Unique Identifiers
Mindat ID:
4196
Long-form identifier:
mindat:1:1:4196:2
GUID
(UUID V4):
(UUID V4):
e7e0931d-1f7b-4e4b-b725-f19b5b7d1e0e
IMA Classification of Vlasovite
Approved
Approval year:
1967
First published:
1961
Classification of Vlasovite
9.DM.25
9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
66.2.2.1
66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
2 : Amphiboles - Ca subgroup
66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
2 : Amphiboles - Ca subgroup
14.10.5
14 : Silicates not Containing Aluminum
10 : Silicates of Zr or Hf
14 : Silicates not Containing Aluminum
10 : Silicates of Zr or Hf
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Vsv | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Vlasovite
Vitreous, Greasy, Pearly
Transparency:
Translucent
Comment:
highly vitreous to pearly on cleavage surfaces.
Colour:
Colorless, honey-brown
Hardness:
6 on Mohs scale
Hardness:
VHN100=770 - Vickers
Cleavage:
Distinct/Good
{010}, good; {h0l}, poor.
{010}, good; {h0l}, poor.
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.92 - 2.97 g/cm3 (Measured) 3.07 g/cm3 (Calculated)
Optical Data of Vlasovite
Type:
Biaxial (-)
RI values:
nα = 1.607(3) nβ = 1.623(3) nγ = 1.628(3)
2V:
Measured: 40° to 56°
Max Birefringence:
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v
Chemistry of Vlasovite
Mindat Formula:
Na2ZrSi4O11
Elements listed:
Crystallography of Vlasovite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 11.0390(5) Å, b = 10.0980(4) Å, c = 8.5677(4) Å
β = 100.313(1)°
β = 100.313(1)°
Ratio:
a:b:c = 1.093 : 1 : 0.848
Unit Cell V:
939.6 ų
Z:
4
Twinning:
Twin plane {010}, uncommon.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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CIF File Best | x | y | z | a | b | c
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0006128 | Vlasovite | Sokolova E, Hawthorne F C, Ball N A, Mitchell R H, Della Ventura G (2006) Vlasovite, Na2Zr(Si4O11), from the Kipawa alkaline complex, Quebec, Canada: Crystal-structure refinement and infrared spectroscopy The Canadian Mineralogist 44 1349-1356 | 2006 | Kipawa alkaline complex, Quebec, Canada | 0 | 293 | |
0014182 | Vlasovite | Voronkov A A, Zhdanova T A, Pyatenko Y A (1974) Refinement of the structure of vlasovite Na2ZrSi4O11 and some characteristics of the composition and structure of the zirconosilicates Kristallografiya 19 252-259 | 1974 | 0 | 293 | ||
0014445 | Vlasovite | Fleet S G, Cann J R (1967) Vlasovite: a second occurrence and a triclinic to monoclinic inversion Mineralogical Magazine 36 233-241 | 1967 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
5.053 Å | (100) |
3.669 Å | (75) |
3.882 Å | (45) |
3.237 Å | (40) |
3.363 Å | (35) |
3.548 Å | (25) |
1.945 Å | (20) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4a: Earth’s earliest continental crust | >4.4-3.0 |
19 : Granitic intrusive rocks | |
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Vlasovite
General Appearance of Type Material:
crystals, to 15 cm
Place of Conservation of Type Material:
Mining Institute, St. Petersburg, 1037/1; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 83207, vis5052; National School of Mines, Paris, France.
Reference:
Tikhonenkova, R.P., Kazakova, M.E. (1961) Vlasovite - a new zirconium silicate from the Lovozero Massif. Doklady Akademii Nauk SSSR: 137: 944-946.
Other Language Names for Vlasovite
Common Associates
Associated Minerals Based on Photo Data:
87 photos of Vlasovite associated with Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
66 photos of Vlasovite associated with Gittinsite | CaZrSi2O7 |
27 photos of Vlasovite associated with Agrellite | NaCa2Si4O10F |
18 photos of Vlasovite associated with Albite | Na(AlSi3O8) |
9 photos of Vlasovite associated with Katophorite | {Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2 |
9 photos of Vlasovite associated with Nepheline | Na3K(Al4Si4O16) |
3 photos of Vlasovite associated with Rinkite-(Ce) | (Ca3Ce)Na(NaCa)Ti(Si2O7)2(OF)F2 |
2 photos of Vlasovite associated with Astrophyllite | K2NaFe2+7Ti2Si8O26(OH)4F |
2 photos of Vlasovite associated with Aegirine | NaFe3+Si2O6 |
2 photos of Vlasovite associated with Fluornatropyrochlore | (Na,Pb,Ca,REE,U)2Nb2O6F |
Related Minerals - Strunz-mindat Grouping
9.DM. | Kesebolite-(Ce) | CeCa2Mn(AsO4)(SiO3)3 |
9.DM. | Plumbogaidonnayite | PbZrSi3O9 · 2H2O |
9.DM.05 | Stokesite | CaSn[Si3O9] · 2H2O |
9.DM.10 | Calciohilairite | CaZr[SiO3]3 · 3H2O |
9.DM.10 | Hilairite | Na2Zr[SiO3]3 · 3H2O |
9.DM.10 | Komkovite | BaZr[Si3O9] · 3H2O |
9.DM.10 | Sazykinaite-(Y) | Na5YZr[SiO3]6 · 6H2O |
9.DM.10 | Pyatenkoite-(Y) | Na5YTi[SiO3]6 · 6H2O |
9.DM.15 | Gaidonnayite | Na2Zr(Si3O9) · 2H2O |
9.DM.15 | Georgechaoite | NaKZr[Si3O9] · 2H2O |
9.DM.20 | Chkalovite | Na2BeSi2O6 |
9.DM.30 | Revdite | Na16Si16O27(OH)26 · 28H2O |
9.DM.35 | Scheuchzerite | Na(Mn,Mg,Zn)9[VSi9O28(OH)](OH)3 |
9.DM.40 | Hydroterskite | Na2ZrSi6O12(OH)6 |
9.DM.40 | Terskite | Na4ZrSi6O16 · 2H2O |
Fluorescence of Vlasovite
Altered portions fluoresce brownish yellow under SW UV
Other Information
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 Vlasovite
mindat.org URL:
https://www.mindat.org/min-4196.html
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References for Vlasovite
Reference List:
Fleet, S. G., Cann, J. R. (1967) Vlasovite: a second occurrence and a triclinic to monoclinic inversion. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (278) 233-241 doi:10.1180/minmag.1967.036.278.06
IMA (1967) International Mineralogical Association: Commission on New Minerals and Mineral Names. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (277) 131-136 doi:10.1180/minmag.1967.036.277.20
Gittins, J., Gasparrini, E. L., Fleet, S. G. (1973) The occurrence of vlasovite in Canada. The Canadian Mineralogist, 12 (3) 211-214
Currie, K. L., Zaleski, E. (1985) The relative stability of elpidite and vlasovite: a P-T indicator for peralkaline rocks. The Canadian Mineralogist, 23 (4) 577-582
Gobechiya, E. R., Pekov, I. V., Pushcharovskii, D. Yu., Ferraris, G., Gula, A., Zubkova, N. V., Chukanov, N. V. (2003) New data on vlasovite: Refinement of the crystal structure and the radiation damage of the crystal during the x-ray diffraction experiment. Crystallography Reports, 48 (5) 750-754 doi:10.1134/1.1612595
Sokolova, E., Hawthorne, F. C., Ball, N. A., Mitchell, R. H., Della Ventura, G. (2006) Vlasovite, Na2Zr(Si4O11), from the Kipawa alkaline complex, Quebec, Canada: crystal-structure refinement and infrared spectroscopy. The Canadian Mineralogist, 44 (6) 1349-1356 doi:10.2113/gscanmin.44.6.1349
Localities for Vlasovite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Antarctica | |
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Australia | |
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Canada | |
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Birkett, T. C., Miller, R. R., Roberts, A. C., Mariano, A. N. (1992) Zirconium bearing minerals from the Strange Lake intrusive complex, Quebec Labrador. The Canadian Mineralogist, 30 (1) 191-205 Salvi, Stefano, Williams-Jones, Anthony E. (1995) Zirconosilicate phase relations in the Strange Lake (Lac Brisson) Pluton, Quebec-Labrador, Canada. American Mineralogist, 80 (9) 1031-1040 doi:10.2138/am-1995-9-1019 | |
Czech Republic | |
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India | |
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Portugal | |
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Russia | |
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Saint Helena, Ascension and Tristan da Cunha | |
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Água de Pau Volcano, São Miguel, Azores, Portugal