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Byrudite

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About ByruditeHide

Formula:
(Be,☐)(V3+,Ti,Cr)3O6
ideal formula (by analogy to norbergite): V23+Ti(BeO4)O2
Colour:
Black
Lustre:
Metallic
Hardness:
7
Specific Gravity:
4.35
Crystal System:
Orthorhombic
Name:
Named by G. Raade, T. Balić-Žunić, and C.J. Stanley after the type locality of Byrud Emerald Mine, Norway.
Isostructural with:
A mineral related to kyzylkumite discovered in the emerald deposit of Byrud, Norway. The V analogue of (the recently approved) verbierite. Unique combination of elements; also the only currently known Be-V mineral.

Byrudite has a norbergite-type structure. It consists of kinked chains of edge-sharing V and Ti octahedra. These polyhedra are interconnected by isolated BeO4 tetrahedra. It is suggested that F and OH are not present, which would be consistent with the substitution of "sellaite" component of norbergite by "rutile" component.


Classification of ByruditeHide

Approved
Approval Year:
2013
4.CA.

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
A : With small cations

Physical Properties of ByruditeHide

Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Black
Hardness:
Hardness:
VHN100=1493 - Vickers
Comment:
~7, based on indentation measurements
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.35 g/cm3 (Measured)    
Comment:
Calculated for the empirical formula with 0.84 Be apfu

Optical Data of ByruditeHide

Type:
Anisotropic
Anisotropism:
Weak
Bireflectance:
Weak
Reflectivity:
470nmR1=16.6%R2=17.5%
546nmR1=16.7%R2=17.9%
589nmR1=16.8%R2=18.3%
650nmR1=16.8%R2=18.6%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 18.6%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Gray
Internal Reflections:
not present
Pleochroism:
Non-pleochroic

Chemical Properties of ByruditeHide

Formula:
(Be,☐)(V3+,Ti,Cr)3O6

ideal formula (by analogy to norbergite): V23+Ti(BeO4)O2
IMA Formula:
(Be,◻)(V3+,Ti)3O6
Common Impurities:
Ti,Cr,Fe,Al

Crystallography of ByruditeHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 9.982(1) Å, b = 8.502(1) Å, c = 4.5480(6) Å
Ratio:
a:b:c = 1.174 : 1 : 0.535
Unit Cell V:
385.97 ų
Z:
4
Twinning:
Occurs on {210}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.15(w)
3.72(m)
2.96(s)
2.57(w)
2.48(vw)
2.17(w)
1.68(s)
1.43(w)
Comments:
From Type Description.

Type Occurrence of ByruditeHide

General Appearance of Type Material:
single/intergrown prisms, up to ca. 1 x 0.1 mm, needle- or lath-like; may be striated along the length as a result of twinning on
{210}; six-sided cross sections observed; crystal faces uneven and indistinct
Place of Conservation of Type Material:
Type material is deposited in the collections of the Natural History Museum, University of Oslo, Norway, catalogue number 43570
Geological Setting of Type Material:
Emerald-bearing syenitic pegmatites of Permian age (Byrud); rare, primary magmatic phase within quartz
Associated Minerals at Type Locality:

Synonyms of ByruditeHide

Fluorescence of ByruditeHide

non-fluorescent

Other InformationHide

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 ByruditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Balić-Žunić, T., Raade, G. (2003) The crystal structure of kyzylkumite, BeV2TiO6. Abstracts, 21st European Crystallographic Meeting (Durban, South Africa): 145.
Raade, G., Balić-Žunić, T. (2006) The crystal structure of (Be,□)(V,Ti)3O6, a mineral related to kyzylkumite. The Canadian Mineralogist: 44: 1147-1158.
Raade, G., Balić-Žunić, T., Stanley, C.J. (2013) IMA 2013-045. CNMNC Newsletter No. 17, October 2013, page 3000; Mineralogical Magazine: 77: 2997-3005.
Raade, G., Balić-Žunić, T., Stanley, C.J. (2015) Byrudite, (Be,□)(V3+,Ti)3O6, a new mineral from the Byrud emerald mine, South Norway. Mineralogical Magazine: 79: 261-268; in: Gagne, O.C., Belakovskiy, D.I., Cámara, F. (2016): New mineral names. American Mineralogist: 101: 1240-1243.
Kvamsdal, L.O. (2016) Byruditt, (Be,☐)(V3+,Ti)3O6, et nytt mineral for verden. Stein: 43(1): 20-23.

Internet Links for ByruditeHide

Localities for ByruditeHide

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.
Norway (TL)
 
  • Akershus
    • Eidsvoll (Eidsvold)
      • Minnesund
Raade, G., Balić-Žunić, T. and Stanley, C.J. (2013) IMA 2013-045. CNMNC Newsletter No. 17, October 2013, page 3000; Mineralogical Magazine, 77, 2997-3005;Raade, G., Balić-Žunić, T. and Stanley, C.J. (2015): Byrudite, (Be,□)(V3+,Ti)3O6, a new mineral from the Byrud emerald mine, South Norway. Mineralogical Magazine, 79, 261-268
Mineral and/or Locality  
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