Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above
Forms:
( 2 3 0) ( 1 0 1)
Warning: this java applet does not work in some browsers because of security restrictions.
Physical Properties of Gudmundite
Cleavage:
None
Color:
Silvery white, Steel gray.
Density:
6.72
Diaphaneity:
Opaque
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Crystalline - Fine - Occurs as well-formed fine sized crystals.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luster:
Metallic
Streak:
grayish black
Optical Properties of Gudmundite
RL Anisotrophism:
Strong, in yellow and red tints.
RL Color:
Silver white to steel-gray.
RL Pleochroism:
Distinct, in pure white and pinkish white.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Gudmundite in Air
λ
R1
R2
∑ R1(λ)
∑ R2(λ)
400 nm
45.10
52.60
420 nm
46.00
53.40
440 nm
46.90
54.20
460 nm
47.70
54.80
480 nm
48.30
55.30
500 nm
48.70
55.50
520 nm
49.30
55.50
540 nm
49.90
55.30
560 nm
50.40
55.10
580 nm
50.80
55.00
600 nm
51.10
54.70
620 nm
51.30
54.40
640 nm
51.50
54.00
660 nm
51.90
53.60
680 nm
52.40
53.10
700 nm
53.10
52.70
Calculated Relative Intensity Colors of Gudmundite in Air
Relative Intensity
0%
20%
40%
60%
80%
100%
120%
140%
160%
180%
190%
R1
R2
Calculated Properties of Gudmundite
Electron Density:
Bulk Density (Electron Density)=6.16 gm/cc note: Specific Gravity of Gudmundite =6.94 gm/cc.
Fermion Index:
Fermion Index = 0.0067940047 Boson Index = 0.9932059953
Photoelectric:
PEGudmundite = 202.04 barns/electron U=PEGudmundite x rElectron Density=1,243.90 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Gudmundite is Not Radioactive
Gudmundite Classification
Dana Class:
02.12.04.02(02)Sulfides - Including Selenides and Tellurides
Chemical Formula: 
