Mineralogy Database

Vonsenite Mineral Data

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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 Name Pronunciation: Name Pronunciation: Vonsenite + Pronunciation Say VONSENITE
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 - Dipyramidal H-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),
 

Physical Properties of Vonsenite

Help on Cleavage: Cleavage: None
Help on Color: Color: Greenish black, Black.
Help on Density: Density: 4.21
Help on Diaphaneity: Diaphaneity: 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 (+)
  NCalc= 2.11 - from Gladstone-Dale relationship (KC = 0.2309) where Ncalc=Dcalc*KC+1
NCalc= 1.97 - from Gladstone-Dale relationship (KC = 0.2309) where Ncalc=Dmeas*KC+1
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: Bulk Density (Electron Density)=4.58 gm/cc
note: Specific Gravity of Vonsenite =4.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEVonsenite = 19.83 barns/electron
U=PEVonsenite x rElectron Density= 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: 24.02.01.02 (24)Borates - Anhydrous
  (24.02)where (A)2 BO2 [XO3]
  (24.02.01)Ludwigite Group (Space Group: Pbam)
 
24.02.01.01 Ludwigite Mg2FeBO5 Pbam 2/m 2/m 2/m
 
24.02.01.02 Vonsenite Fe2FeBO5 Pbam 2/m 2/m 2/m
 
24.02.01.03 Azoproite (Mg,Fe)2(Fe,Ti,Mg)BO5 Pbam 2/m 2/m 2/m
 
24.02.01.04 Bonaccordite Ni2FeBO5 Pbam 2/m 2/m 2/m
 
24.02.01.05 Chestermanite Mg2(Fe,Mg,Al,Sb)BO3O2 Pbam 2/m 2/m 2/m
 
24.02.01.06 Fredrikssonite Mg2(Mn,Fe)O2(BO3) Pbam 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 06.AB.30 06 - BORATES
  06.A - Monoborates
  06.AB -BO3, with additional anions; 1(D) + OH, etc.
 
06.AB.30 Azoproite (Mg,Fe)2(Fe,Ti,Mg)BO5 Pbam 2/m 2/m 2/m
 
06.AB.30 Bonaccordite Ni2FeBO5 Pbam 2/m 2/m 2/m
 
06.AB.30 Fredrikssonite Mg2(Mn,Fe)O2(BO3) Pbam 2/m 2/m 2/m
 
06.AB.30 Ludwigite Mg2FeBO5 Pbam 2/m 2/m 2/m
 
06.AB.30 Vonsenite Fe2FeBO5 Pbam 2/m 2/m 2/m
 

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 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Vonsenite

Fe++2Fe+++BO5
Dana No: 24.02.01.02 Strunz No: 06.AB.30
Locality:

 

Notes:

 

 
   
 


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