Bavsiite
A valid IMA mineral species
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About Bavsiite
Formula:
Ba2V2O2[Si4O12]
Colour:
Sky-blue
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
4.171 (Calculated)
Crystal System:
Tetragonal
Name:
Named for the composition, that includes BArium, Vanadium and SIlicon.
Dimorph of:
This page provides mineralogical data about Bavsiite.
Unique Identifiers
Mindat ID:
46155
Long-form identifier:
mindat:1:1:46155:3
GUID
(UUID V4):
(UUID V4):
92ccd13b-fa66-432e-91bf-af2324a6bab6
IMA Classification of Bavsiite
Approved
Approval year:
2014
First published:
2019
Classification of Bavsiite
9.DH.
9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
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 |
---|---|---|
Bav | 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 Bavsiite
Vitreous
Transparency:
Transparent
Colour:
Sky-blue
Streak:
White
Hardness:
4 on Mohs scale
Cleavage:
Distinct/Good
Good parallel to (001).
Good parallel to (001).
Density:
4.171 g/cm3 (Calculated)
Comment:
Density was not measured due to inclusions.
Optical Data of Bavsiite
Type:
Uniaxial (+)
RI values:
nω = 1.725(3) nε = 1.750(3)
Max Birefringence:
δ = 0.025
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:
High
Dispersion:
Weak, r > v.
Pleochroism:
Visible
Comments:
ω = medium blue; ε = pale yellow.
Chemistry of Bavsiite
Mindat Formula:
Ba2V2O2[Si4O12]
Elements listed:
Crystallography of Bavsiite
Crystal System:
Tetragonal
Class (H-M):
4/m - Dipyramidal
Space Group:
I4/m
Setting:
I4/m
Cell Parameters:
a = 7.051(1) Å, c = 11.470(1) Å
Ratio:
a:c = 1 : 1.627
Unit Cell V:
570.25 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Platy crystals flattened on {001}.
Twinning:
Merohedral twinning.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.763 Å | (30) |
3.361 Å | (44) |
3.004 Å | (100) |
2.493 Å | (43) |
2.486 Å | (67) |
2.286 Å | (24) |
1.785 Å | (39) |
1.763 Å | (25) |
Comments:
Gun claim, Yukon, Canada. Data from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits |
Type Occurrence of Bavsiite
General Appearance of Type Material:
Millimetre-sized sky-blue platy crystals.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collection of the Universalmuseum Joanneum, Weinzöttlstrabe 16, A-8045 Graz, Austria, catalogue number 85.282.
Geological Setting of Type Material:
Barium-rich low-temperature skarn related to a porphyritic quartz monzonite stock.
Associated Minerals at Type Locality:
Reference:
Bojar, H.-P., Walter, F., Baumgartner, J. (2019) Bavsiite, Ba2V2O2[Si4O12], mineral data and crystal structure. Mineralogical Magazine: 83(6): 821-827
Synonyms of Bavsiite
Common Associates
Related Minerals - Strunz-mindat Grouping
9.DH. | Gageite-2M | (Mn,Mg,Zn)42Si16O54(OH)40 |
9.DH. | Devilliersite | Ca4Ca2Fe3+10O4[(Fe3+10Si2)O36] |
9.DH. | Yuzuxiangite | Sr3Fe3+(Si2O6)2(OH) · 3H2O |
9.DH. | Louisfuchsite | Ca2(Mg4Ti2)(Al4Si2)O20 |
9.DH.05 | Leucophanite | NaCaBeSi2O6F |
9.DH.10 | Ohmilite | Sr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2O |
9.DH.15 | Haradaite | SrVSi2O7 |
9.DH.15 | Suzukiite | BaVSi2O7 |
9.DH.20 | Batisite | BaNaNaTi2(Si4O12)O2 |
9.DH.20 | Shcherbakovite | (K,Ba)KNa(Ti,Nb)2(Si4O12)O2 |
9.DH.20 | Noonkanbahite | BaKNaTi2(Si4O12)O2 |
9.DH.25 | Taikanite | Sr3BaMn2+2(Si4O12)O2 |
9.DH.30 | Krauskopfite | BaSi2O5 · 3H2O |
9.DH.35 | Balangeroite | (Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40 |
9.DH.35 | Gageite | Mn21(Si4O12)2O3(OH)20 |
9.DH.40 | Aenigmatite | Na4[Fe2+10Ti2]O4[Si12O36] |
9.DH.40 | Dorrite | Ca4(Mg3Fe3+9)O4(Si3Al8Fe3+O36) |
9.DH.40 | Høgtuvaite | Ca4[Fe2+6Fe3+6]O4[Si8Be2Al2O36] |
9.DH.40 | Krinovite | Na2Mg4Cr3+2(Si6O18)O2 |
9.DH.40 | Makarochkinite | (Ca,Na)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36] |
9.DH.40 | Rhönite | Ca4[Mg8Fe3+2Ti2]O4[Si6Al6O36] |
9.DH.40 | Serendibite | Ca4[Mg6Al6]O4[Si6B3Al3O36] |
9.DH.40 | Welshite | Ca4Mg9Sb3O4[Si6Be3AlFe2O36] |
9.DH.40 | Wilkinsonite | Na2Fe2+4Fe3+2(Si6O18)O2 |
9.DH.40 | Leucorhönite | Ca2(Mg,Fe3+,Al)6(Si,Al)6O20 |
9.DH.40 | Kuratite | Ca2(Fe2+5Ti)O2[Si4Al2O18] |
9.DH.40 | Khesinite | Ca4(Mg3Fe3+9)O4(Fe3+9Si3)O36 |
9.DH.40 | UM1991-29-SiO:FeMgNa | Na4(Mg5Fe3+7)O4[Si9Fe3+3O36] |
9.DH.45 | Sapphirine | Mg4(Mg3Al9)O4[Si3Al9O36] |
9.DH.50 | Khmaralite | (Mg,Al,Fe)16[(Al,Si,Be)12O36]O4 |
9.DH.55 | Surinamite | (Mg,Fe)3Al4BeSi3O16 |
9.DH.55 | UM1988-26-SiO:AlMg | Mg4Al2O[Si3Al2O15] |
9.DH.60 | Deerite | (Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5 |
9.DH.65 | Howieite | Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13 |
9.DH.65 | Taneyamalite | (Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44 |
9.DH.70 | Johninnesite | Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2 |
9.DH.75 | Agrellite | NaCa2Si4O10F |
Fluorescence of Bavsiite
Not fluorescent.
Other Information
IR Spectrum:
Bands at 1223w, 1068s, 993sh, 916s, 743w, 659s, 584m, 537w, 478s and 427m in cm-1 where s=strong, m=medium, w=weak, sh=shoulder.
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 Bavsiite
mindat.org URL:
https://www.mindat.org/min-46155.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
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References for Bavsiite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2014) New minerals and nomenclature modifications approved in 2014, CNMNC Newsletter No 21. Mineralogical Magazine, 78 (4) 797-804 doi:10.1180/minmag.2014.078.4.03
Localities for Bavsiite
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.
Austria | |
| Kolitsch et al. (2021) |
Canada (TL) | |
| Dunning et al. (2018) +1 other reference |
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Gun claim, Wilson Lake, Itsi Mountain, Watson Lake mining district, Yukon, Canada