Mineralogy Database

Ranunculite Mineral Data

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General Ranunculite Information

Help on Chemical  Formula: Chemical Formula: HAl(UO2)(PO4)(OH)3•4(H2O)
Help on Composition: Composition: Molecular Weight = 516.07 gm
   Uranium     46.12 %  U    52.32 % UO2
   Aluminum     5.23 %  Al    9.88 % Al2O3
   Phosphorus   6.00 %  P    13.75 % P2O5
   Hydrogen     2.34 %  H    20.95 % H2O
   Oxygen      40.30 %  O
              ______        ______ 
              100.00 %       96.90 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: HAl(UO2)(PO4)(OH)3•4(H2O)
Help on Environment: Environment: In U-rich portions of a pegmatite with other Al-U phosphates.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Kobokobo, Kivu, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the color "ranunculus", buttercup.
Help on Name Pronunciation: Name Pronunciation: Ranunculite + Pronunciation Say RANUNCULITE

Ranunculite Image

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Comments: SEM image of nodular ranunculite showing the aggregates of lamellar crystals. (MinMag v43:327).
Location: Uranium-rich portions of a pegmatite mainly worked for beryl and columbite at Kobokobo, Kivu, Zaire. Scale: Picture Size 300 x.
© Mineralogical Magazine

Ranunculite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6271:1:1.0169
Help on Cell Dimensions: Cell Dimensions: a = 11.1, b = 17.7, c = 18, Z = 14; beta = 90° V = 3,536.46 Den(Calc)= 3.39
Help on Crystal System: Crystal System: Monoclinic Space Group: Unk (pseudo ORTH)
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9(1), 3.133(0.8), 4.7(0.5),

Physical Properties of Ranunculite

Help on Cleavage: Cleavage: {001} Perfect, {100} Perfect
Help on Color: Color: Golden yellow, Canary yellow.
Help on Density: Density: 3.4
Help on Fracture: Fracture: Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Streak: Streak: light yellow

Optical Properties of Ranunculite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.146 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.149 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1944,KPDmeas= 0.1938,KC= 0.1692
Ncalc = 1.57 - 1.58
Help on Optical Data: Optical Data: Biaxial (-), a=1.643, b=1.664, g=1.67, bire=0.0270, 2V(Calc)=54, 2V(Meas)=56.
Help on Pleochroism (x): Pleochroism (x): pale green yellow.
Help on Pleochroism (y): Pleochroism (y): yellow.
Help on Pleochroism (z): Pleochroism (z): pale green yellow.

Calculated Properties of Ranunculite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.11 gm/cc
note: Specific Gravity of Ranunculite =3.40 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.003517842
Boson Index = 0.996482158
Help on Photoelectric: Photoelectric: PERanunculite =1,144.68 barns/electron
U=PERanunculite x relectron=3,559.54 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,595,715.89 (Gamma Ray American Petroleum Institute Units)
Concentration of Ranunculite per GRapi unit = 278.11 (PPB)

Ranunculite 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) 8.46 ± 2.11 grams of pure Ranunculite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 845.91 ±211.48 grams of pure Ranunculite .

Estimated Radioactivity from Ranunculite - very strong
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 8.25 cm 82,560,572 2.23E-03 3,595,715.89 1,182.15
100 gm / 3.83 cm 8,256,057 2.23E-04 359,571.59 118.22
10 gm / 1.78 cm 825,606 2.23E-05 35,957.16 11.82
1 gm / 8.25 mm 82,561 2.23E-06 3,595.72 1.18
0.1 gm / 3.83 mm 8,256 2.23E-07 359.57 0.12
0.01 gm / 1.78 mm 826 2.23E-08 35.96 0.01
0.001 gm / 0.83 mm 83 2.23E-09 3.60 0.00

Weight of pure Ranunculite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.40 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

Ranunculite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.02)where (AB)3 (XO4) Zq � x(H2O)
  (42.02.02)Dana Group Ranunculite HAl(UO2)(PO4)(OH)3•4(H2O) Unk (pseudo ORTH) Mono
Help on  Strunz Class: Strunz Class: 08.EB.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.E - Uranyl Phosphates and Arsenates
  08.EB -UO2:RO4 = 1:1
08.EB.40 Ranunculite HAl(UO2)(PO4)(OH)3•4(H2O) Unk (pseudo ORTH) Mono

Other Ranunculite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Ranunculite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - Uranium Minerals

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Dana No: Strunz No: 08.EB.40





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