Accessory mineral found in albite veins intersecting augite syenites of the Ilimaussaq alkaline rocks. Ba-dominant analogue of belovite-(Ce); structure determined.
IMA Status:
Approved IMA 2004 (Dana # Added)
Locality:
Kuannersuit Plateau (formerly Kvanefjeld) in the Ilimaussaq alkaline complex, South Greenland. Link to MinDat.org Location Data.
Name Origin:
Named for the locality.
Synonym:
IMA2002-013
Kuannersuite-(Ce) Crystallography
Axial Ratios:
a:c = 1:0.747
Cell Dimensions:
a = 9.9097, c = 7.4026, Z = 1; V = 629.56 Den(Calc)= 4.50
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Habit:
Hexagonal - Six-sided crystal shape in cross-section or habit.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Hardness:
4.5-5.5 - Near Apatite
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Kuannersuite-(Ce)
Gladstone-Dale:
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1514,KC= 0.1493 Ncalc = 1.67
Optical Data:
Uniaxial (-), e=1.669, w=1.694, bire=0.0250.
Calculated Properties of Kuannersuite-(Ce)
Electron Density:
Bulk Density (Electron Density)=3.98 gm/cc note: Specific Gravity of Kuannersuite-(Ce) =4.50 gm/cc.
Fermion Index:
Fermion Index = 0.09 Boson Index = 0.91
Photoelectric:
PEKuannersuite-(Ce) = 290.34 barns/electron U=PEKuannersuite-(Ce) x relectron=1,155.19 barns/cc.
Radioactivity:
GRapi = 5,158.93 (Gamma Ray American Petroleum Institute Units)
Concentration of Kuannersuite-(Ce) per GRapi unit = 193.84 (PPM)
Kuannersuite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Kuannersuite-(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 / 7.52 cm
122,533
3.31E-06
5,158.93
1.70
100 gm / 3.49 cm
12,253
3.31E-07
515.89
0.17
10 gm / 1.62 cm
1,225
3.31E-08
51.59
0.02
1 gm / 7.52 mm
123
3.31E-09
5.16
0.00
0.1 gm / 3.49 mm
12
3.31E-10
0.52
0.00
0.01 gm / 1.62 mm
1
3.31E-11
0.05
0.00
0.001 gm / 0.75 mm
0
3.31E-12
0.01
0.00
Weight of pure Kuannersuite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.50 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
Kuannersuite-(Ce) Classification
Dana Class:
41.08.01.06b(41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
Chemical Formula: 
- mild