Kivuite Mineral Data (original) (raw)
General Kivuite Information
Chemical Formula:
(Th,Ca,Pb)H2(UO2)4(PO4)2(OH)8•7(H2O)
Composition:
Molecular Weight = 1,706.20 gm
Calcium 0.70 % Ca 0.99 % CaO
Thorium 8.16 % Th 9.29 % ThO2
Uranium 55.80 % U 63.31 % UO2
Phosphorus 3.63 % P 8.32 % P2O5
Hydrogen 1.42 % H 12.67 % H2O
Lead 1.21 % Pb 1.31 % PbO
Oxygen 29.07 % O
______ ______
100.00 % 95.87 % = TOTAL OXIDE
Empirical Formula:
Th0.6Ca0.3Pb0.1H2(UO2)4(PO4)2(OH)8�7(H2O)
IMA Status:
Discredited IMA 1962 - Valid Mineral (Pre-IMA) 1958
Locality:
Kobokobo pegmatite, Kivu, Zaire. Link to MinDat.org Location Data.
Name Origin:
Named in 1958 for the locality.
Kivuite Image
Images:
Kivuite Crystallography
Axial Ratios:
a:b:c =0.9211:1:0.7981
Cell Dimensions:
a = 15.88, b = 17.24, c = 13.76, Z = 6; V = 3,767.09 Den(Calc)= 4.51
Crystal System:
OrthorhombicSpace Group: Unk
X Ray Diffraction:
By Intensity(I/Io): 10.3(1), 7.96(0.9), 2.87(0.8),3.08(0.8), 3.86(0.6), 3.94(0.6), 4.43(0.6), 5.88(0.6),
Physical Properties of Kivuite
Color:
Yellow.
Habit:
Aggregates - Made of numerous individual crystals or clusters.
Habit:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Habit:
Platy - Sheet forms (e.g. micas).
Hardness:
2-3 - Gypsum-Calcite
Luminescence:
Non-fluorescent.
Streak:
light yellow
Optical Properties of Kivuite
Gladstone-Dale:
CI calc= -0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1424,KC= 0.1409
Ncalc = 1.64
Optical Data:
Biaxial (-), a=1.618, b=1.654, g=1.655, bire=0.0370, 2V(Calc)=18, 2V(Meas)=0-5.
Pleochroism (x):
colorless.
Pleochroism (y):
greenish yellow.
Pleochroism (z):
greenish yellow.
Calculated Properties of Kivuite
Electron Density:
Bulk Density (Electron Density)=3.90 gm/cc
note: Specific Gravity of Kivuite =4.51 gm/cc.
Fermion Index:
Fermion Index = 0.0068528974
Boson Index = 0.9931471026
Photoelectric:
PEKivuite =1,683.33 barns/electron
U=PEKivuite x relectron=6,569.32 barns/cc.
Radioactivity:
GRapi = 4,266,550.16 (Gamma Ray American Petroleum Institute Units)
Concentration of Kivuite per GRapi unit = 234.38 (PPB)
Kivuite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Maximum U.S. Postal Shipping Size(10 mRem/hr limit, Unshielded 10 cm box) 7.13 ± 1.78 grams of pure Kivuite .
Estimated Maximum U.S. Postal Shipping Size(10 mRem/hr limit, Unshielded 100 cm box) 712.91 ±178.23 grams of pure Kivuite .
Estimated Radioactivity from Kivuite 
- very strong
| SpecimenSizeWeight/Volume(Sphere) * | CalculatedActivityBecquerels(Bq) | CalculatedActivityCuries (Ci) | EstimatedActivityGR(api) | EstimatedExposure(mRem**)/hrIf Held in HandFor One Hour |
|---|---|---|---|---|
| 1000 gm / 7.51 cm | 103,543,393 | 2.80E-03 | 4,266,550.16 | 1,402.70 |
| 100 gm / 3.49 cm | 10,354,339 | 2.80E-04 | 426,655.02 | 140.27 |
| 10 gm / 1.62 cm | 1,035,434 | 2.80E-05 | 42,665.50 | 14.03 |
| 1 gm / 7.51 mm | 103,543 | 2.80E-06 | 4,266.55 | 1.40 |
| 0.1 gm / 3.49 mm | 10,354 | 2.80E-07 | 426.66 | 0.14 |
| 0.01 gm / 1.62 mm | 1,035 | 2.80E-08 | 42.67 | 0.01 |
| 0.001 gm / 0.75 mm | 104 | 2.80E-09 | 4.27 | 0.00 |
Weight of pure Kivuite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.51 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
Kivuite Classification
Dana Class:
42.04.09.03 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
(42.04)where (AB)5 (XO4)2 Zq � x(H2O)
(42.04.09)Arsenuranylite Group
42.04.09.01 Arsenuranylite Ca(UO2)4(AsO4)2(OH)4•6(H2O) Bmmb 2/m 2/m 2/m
42.04.09.02 Renardite Pb(UO2)4(PO4)2(OH)4•7(H2O) Bmmb 2/m 2/m 2/m
42.04.09.03 Kivuite? (Th,Ca,Pb)H2(UO2)4(PO4)2(OH)8•7(H2O) Unk Ortho
Strunz Class:
08.EC.10 08 - PHOSPHATES, ARSENATES, VANADATES
08.E - Uranyl Phosphates and Arsenates
08.EC -UO2:RO4 = 3:2
08.EC.10 Arsenuranylite Ca(UO2)4(AsO4)2(OH)4•6(H2O) Bmmb 2/m 2/m 2/m
08.EC.10 Dewindtite Pb3[H(UO2)3O2(PO4)2]2•12(H2O) Bmmb 2/m 2/m 2/m
08.EC.10 Kivuite? (Th,Ca,Pb)H2(UO2)4(PO4)2(OH)8•7(H2O) Unk Ortho
08.EC.10 Renardite Pb(UO2)4(PO4)2(OH)4•7(H2O) Bmmb 2/m 2/m 2/m
08.EC.10 Phosphuranylite KCa(H3O)3(UO2)7(PO4)4O4•8(H2O) C mcm 2/m 2/m 2/m
08.EC.10 Yingjiangite (K2,Ca)(UO2)7(PO4)4(OH)6•6(H2O) Bmmb 2/m 2/m 2/m
Other Kivuite Information
References:
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
See Also:
Links to other databases for Kivuite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - Uranium Minerals
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Print or Cut-and-Paste your Kivuite Specimen Label here :
Kivuite
(Th,Ca,Pb)H2(UO2)4(PO4)2(OH)8•7(H2O)
Dana No: 42.04.09.03 Strunz No: 08.EC.10
Locality:
Notes: