Vonsenite Mineral Data + Say VONSENITE

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General Vonsenite Information
Help on Chemical Formula: Chemical Formula: Fe++2Fe+++BO5
Help on Composition: Composition: Molecular Weight = 258.35 gm
   Iron    64.85 %  Fe   55.62 % FeO / 30.91 % Fe2O3
   Boron    4.18 %  B    13.47 % B2O3
   Oxygen  30.96 %  O
          ______        ______ 
          100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+2Fe3+BO5
Help on Environment: Environment: Uncommon in boron-rich skarns.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1920
Help on Locality: Locality: Old City Quarry, Riverside, Riverside County, California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Magnus Vonsen (1879-1954), amateur mineralogist and mineral collector who discovered the mineral.
Help on Synonym: Synonym: ICSD 31214
  PDF 25-395
 

Vonsenite Image

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Vonsenite

Comments: Opaque vonsenite microcrystal.
Location: Colle del Pero Quarry, Laghelto di Montecompatri, Rome, Lazio, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Vonsenite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.7692:1:0.25
Help on Cell Dimensions: Cell Dimensions: a = 9.452, b = 12.287, c = 3.072, Z = 4; V = 356.77 Den(Calc)= 4.81
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.575(1), 5.15(0.3), 1.536(0.17),
Click Here for Large Vonsenite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Swinnea J S , Steinfink H , American Mineralogist , 68 (1983) p.827-832, Crystal structure and Mossbauer spectrum of vonsenite, 2FeO*FeBO3

 

Physical Properties of Vonsenite

Help on Cleavage: Cleavage: None
Help on Color: Color: Greenish black, Black.
Help on Density: Density: 4.21
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Adamantine - Metallic
Help on Streak: Streak: black
 

Optical Properties of Vonsenite

Help on Optical Data: Optical Data: Biaxial (+)
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Vonsenite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   14.20   14.90 
   
 420 nm   13.80   14.70 
 440 nm   13.40   14.60 
 460 nm   13.10   14.40 
 480 nm   12.90   14.40 
 500 nm   12.60   14.20 
 520 nm   12.40   14.30 
 540 nm   12.20   14.50 
 560 nm   12.00   14.50 
 580 nm   11.90   14.60 
 600 nm   11.40   14.60 
 620 nm   11.30   14.70 
 640 nm   10.70   14.50 
 660 nm   10.40   14.30 
 680 nm    9.66   14.10 
 700 nm    9.71   14.40 
Calculated Relative Intensity Colors of Vonsenite in Air
Relative
Intensity		    0%   80% 100% 160% 240% 320% 400% 480% 560% 640% 720% 780%
R1                        
R2                        
 

Calculated Properties of Vonsenite

Help on Electron Density: Electron Density:

relectron=4.58 gm/cc
note: rVonsenite =4.81 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.02222
Boson Index = 0.97778
Help on Photoelectric: Photoelectric:

PEVonsenite = 19.83 barns/electron
U=PEVonsenite x relectron= 90.82 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Vonsenite is Not Radioactive
 

Vonsenite Classification
Help on Dana Class: Dana Class: 24.2.1.2 (24)Borates - Anhydrous
  (24.2)where (A)2 BO2 [XO3]
  (24.2.1)Ludwigite Group (Space Group: Pbam)
 
24.2.1.1 Ludwigite Mg2FeBO5 Pbam 2/m 2/m 2/m
 
24.2.1.2 Vonsenite Fe2FeBO5 Pbam 2/m 2/m 2/m
 
24.2.1.3 Azoproite (Mg,Fe)2(Fe,Ti,Mg)BO5 Pbam 2/m 2/m 2/m
 
24.2.1.4 Bonaccordite Ni2FeBO5 Pbam 2/m 2/m 2/m
 
24.2.1.5 Chestermanite Mg2(Fe,Mg,Al,Sb)BO3O2 Pbam 2/m 2/m 2/m
 
24.2.1.6 Fredrikssonite Mg2(Mn,Fe)O2(BO3) Pbam 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: V/G.04-20 V - Nitrates, Carbonates and Borates
  V/G - "Insel" borates [BO3]3- "inseln"
  V/G.04 - Ludwigite group
 
V/G.04-10 Ludwigite Mg2FeBO5 Pbam 2/m 2/m 2/m
 
V/G.04-20 Vonsenite Fe2FeBO5 Pbam 2/m 2/m 2/m
 
V/G.04-30 Azoproite (Mg,Fe)2(Fe,Ti,Mg)BO5 Pbam 2/m 2/m 2/m
 
V/G.04-40 Chestermanite Mg2(Fe,Mg,Al,Sb)BO3O2 Pbam 2/m 2/m 2/m
 
V/G.04-50 Fredrikssonite Mg2(Mn,Fe)O2(BO3) Pbam 2/m 2/m 2/m
 
V/G.04-60 Bonaccordite Ni2FeBO5 Pbam 2/m 2/m 2/m
 
V/G.04-70 Takeuchiite Mg2MnO2(BO3) Pnnm 2/m 2/m 2/m
 
V/G.04-80 Orthopinakiolite (Mg,Mn)2MnBO5 Pnnm 2/m 2/m 2/m
 
V/G.04-90 Blatterite (Mn,Mg)35Sb3(Mn,Fe)9(BO3)16O32 Pnnm 2/m 2/m 2/m
 
V/G.04-100 Gaudefroyite Ca4Mn3-x(BO3)3(CO3)(O,OH)3 P 63 6
 

Other Vonsenite Information
Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic5)
Help on See Also: See Also: Links to other databases for Vonsenite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Print or Cut-and-Paste your Vonsenite Specimen Label here :

Vonsenite

Fe++2Fe+++BO5
Dana No: 24.2.1.2 Strunz No: V/G.04-20
Locality:

 

Notes:

 
 
   
 
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