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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
Cleavage:
None
Color:
Greenish black, Black.
Density:
4.21
Diaphaneity:
Opaque
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Fibrous - Crystals made up of fibers.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness:
5 - Apatite
Luster:
Adamantine - Metallic
Streak:
black
Optical Properties of Vonsenite
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
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
Electron Density:
Bulk Density (Electron Density)=4.58 gm/cc note: Specific Gravity of Vonsenite =4.81 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEVonsenite = 19.83 barns/electron U=PEVonsenite x rElectron Density= 90.82 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Vonsenite is Not Radioactive