Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Disseminated - Occurs in small, distinct particles dispersed in matrix.
Habit:
Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Hardness:
6 - Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Metallic
Streak:
brown
Optical Properties of Tapiolite-(Fe)
Dichroism (e):
reddish brown.
Dichroism (w):
pale yellowish.
Gladstone-Dale:
CI meas= -0.091 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.072 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.169,KPDmeas= 0.172,KC= 0.1576 Ncalc = 2.23 - 2.25
Optical Data:
Uniaxial (+), w=2.27, e=2.42, bire=0.1500.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Tapiolite-(Fe) in Air
λ
R1
R2
∑ R1(λ)
∑ R2(λ)
400 nm
17.90
17.10
420 nm
17.40
17.00
440 nm
16.90
17.20
460 nm
16.50
17.50
480 nm
16.20
17.60
500 nm
15.90
17.60
520 nm
15.60
17.50
540 nm
15.50
17.40
560 nm
15.30
17.20
580 nm
15.20
17.10
600 nm
15.10
17.00
Calculated Relative Intensity Colors of Tapiolite-(Fe) in Air
Relative Intensity
0%
60%
100%
120%
180%
240%
300%
360%
420%
480%
540%
570%
R1
R2
Calculated Properties of Tapiolite-(Fe)
Electron Density:
Bulk Density (Electron Density)=6.83 gm/cc note: Specific Gravity of Tapiolite-(Fe) =7.96 gm/cc.
Fermion Index:
Fermion Index = 0.0018321453 Boson Index = 0.9981678547
Photoelectric:
PETapiolite-(Fe) = 830.58 barns/electron U=PETapiolite-(Fe) x rElectron Density=5,671.10 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tapiolite-(Fe) is Not Radioactive
Tapiolite-(Fe) Classification
Dana Class:
08.03.01.01(08)Multiple Oxides with Nb, Ta, and Ti
Chemical Formula: 
