Mineralogy Database

Kivuite Mineral Data

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General Kivuite Information

Help on Chemical  Formula: Chemical Formula: (Th,Ca,Pb)H2(UO2)4(PO4)2(OH)8•7(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Th0.6Ca0.3Pb0.1H2(UO2)4(PO4)2(OH)8�7(H2O)
Help on IMA Status: IMA Status: Discredited IMA 1962 - Valid Mineral (Pre-IMA) 1958
Help on Locality: Locality: Kobokobo pegmatite, Kivu, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1958 for the locality.
 

Kivuite Image

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  Kivuite   Dewindtite

Comments: Pale yellow coatings of kivuite with yellowier dewindtite on pegmatite.
Location: Ruggles Mine, Grafton, Grafton County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kivuite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9211:1:0.7981
Help on Cell Dimensions: Cell Dimensions: a = 15.88, b = 17.24, c = 13.76, Z = 6; V = 3,767.09 Den(Calc)= 4.51
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: 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

Help on Color: Color: Yellow.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Streak: Streak: light yellow
 

Optical Properties of Kivuite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1424,KC= 0.1409
Ncalc = 1.64
Help on Optical Data: Optical Data: Biaxial (-), a=1.618, b=1.654, g=1.655, bire=0.0370, 2V(Calc)=18, 2V(Meas)=0-5.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): greenish yellow.
Help on Pleochroism (z): Pleochroism (z): greenish yellow.
 

Calculated Properties of Kivuite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.90 gm/cc
note: Specific Gravity of Kivuite =4.51 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0068528974
Boson Index = 0.9931471026
Help on Photoelectric: Photoelectric: PEKivuite =1,683.33 barns/electron
U=PEKivuite x relectron=6,569.32 barns/cc.
Help on Radioactivity: 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
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 / 7.51 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

Help on  Dana Class: 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
Help on  Strunz Class: 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

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: 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:

 

 
   
 


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