Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
6 - Orthoclase
Luster:
Sub Metallic
Magnetism:
Moderate electrormagnetic
Streak:
brown
Optical Properties of Dingdaohengite-(Ce)
Gladstone-Dale:
CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2037,KPDmeas= 0.2058,KC= 0.2123 Ncalc = 2.03 - 2.04
Optical Data:
Biaxial (-), a=1.978, g=2.01, bire=0.0320
RL Anisotrophism:
Weak.
RL Bireflectance:
Weak.
RL Color:
Grayish yellow.
RL Pleochroism:
Observed in different gray tones.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Dingdaohengite-(Ce) in Air
λ
R1
R2
∑ R1(λ)
∑ R2(λ)
400 nm
10.60
10.40
420 nm
10.60
10.90
440 nm
10.60
10.80
460 nm
11.00
11.00
470 nm
11.40
11.80
480 nm
11.60
11.80
500 nm
11.60
11.80
560 nm
11.40
12.10
580 nm
11.20
11.90
589 nm
11.00
12.50
600 nm
10.70
11.80
620 nm
10.70
11.70
640 nm
10.40
11.60
650 nm
10.10
11.80
Calculated Relative Intensity Colors of Dingdaohengite-(Ce) in Air
Relative Intensity
0%
90%
100%
180%
270%
360%
450%
540%
630%
720%
810%
820%
R1
R2
Calculated Properties of Dingdaohengite-(Ce)
Electron Density:
Bulk Density (Electron Density)=4.41 gm/cc note: Specific Gravity of Dingdaohengite-(Ce) =4.83 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEDingdaohengite-(Ce) = 210.42 barns/electron U=PEDingdaohengite-(Ce) x relectron= 927.96 barns/cc.
Radioactivity:
GRapi = 3,651.37 (Gamma Ray American Petroleum Institute Units)
Concentration of Dingdaohengite-(Ce) per GRapi unit = 273.87 (PPM)
Dingdaohengite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Dingdaohengite-(Ce) - mild
Specimen Size Weight/Volume (Sphere) *
Calculated Activity Bequerols (Bq)
Calculated Activity Curies (Ci)
Estimated Activity GR(api)
Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.34 cm
83,979
2.27E-06
3,651.37
1.20
100 gm / 3.41 cm
8,398
2.27E-07
365.14
0.12
10 gm / 1.58 cm
840
2.27E-08
36.51
0.01
1 gm / 7.34 mm
84
2.27E-09
3.65
0.00
0.1 gm / 3.41 mm
8
2.27E-10
0.37
0.00
0.01 gm / 1.58 mm
1
2.27E-11
0.04
0.00
0.001 gm / 0.73 mm
0
2.27E-12
0.00
0.00
Weight of pure Dingdaohengite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.83 gm/cc.*
Goverment Estimate of Average Annual Exposure (
360 mRem)
** Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Dingdaohengite-(Ce) Classification
Dana Class:
56.02.08.09(56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
(56.02)with cations in [4] and/or >[4] coordination
Chemical Formula: 
- mild