Mineralogy Database

Zirconolite Mineral Data

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General Zirconolite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Ce)Zr(Ti,Nb,Fe+++)2O7
Help on Composition: Composition: Molecular Weight = 363.87 gm
   Calcium     8.81 %  Ca   12.33 % CaO
   Cerium      7.70 %  Ce    9.02 % Ce2O3
   Zirconium  25.07 %  Zr   33.86 % ZrO2
   Titanium   19.74 %  Ti   32.93 % TiO2
   Niobium     2.55 %  Nb    3.65 % Nb2O5
   Aluminum    0.74 %  Al    1.40 % Al2O3
   Iron        4.60 %  Fe    5.92 % FeO
   Oxygen     30.78 %  O
             ______        ______ 
             100.00 %       99.12 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.8Ce0.2ZrTi1.5Fe2+0.3Nb0.1Al0.1O7
Help on Environment: Environment: In pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Fredriksvarn, Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition.
Help on Name Pronunciation: Name Pronunciation: Zirconolite + Pronunciation Say ZIRCONOLITE
Help on Synonym: Synonym: Polymignite - metamict
 

Zirconolite Crystallography

Help on Crystal System: Crystal System: Amorphous- No Crystals
 

Physical Properties of Zirconolite

Help on Color: Color: Black, Brown.
Help on Density: Density: 4.8
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Streak: Streak: dark brown
 

Optical Properties of Zirconolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2542,KC= 0.2636
Ncalc = 2.27
Help on Optical Data: Optical Data: Isotropic, n=2.22.
 

Calculated Properties of Zirconolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.48 gm/cc
note: Specific Gravity of Zirconolite =4.80 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEZirconolite = 82.46 barns/electron
U=PEZirconolite x relectron= 369.40 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 7,666.97 (Gamma Ray American Petroleum Institute Units)
Concentration of Zirconolite per GRapi unit = 130.43 (PPM)

Zirconolite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Zirconolite - 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 / 7.36 cm 172,512 4.66E-06 7,666.97 2.52
100 gm / 3.41 cm 17,251 4.66E-07 766.70 0.25
10 gm / 1.58 cm 1,725 4.66E-08 76.67 0.03
1 gm / 7.36 mm 173 4.66E-09 7.67 0.00
0.1 gm / 3.41 mm 17 4.66E-10 0.77 0.00
0.01 gm / 1.58 mm 2 4.66E-11 0.08 0.00
0.001 gm / 0.74 mm 0 4.66E-12 0.01 0.00

Weight of pure Zirconolite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.80 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
Estimated Thorium Activity ( 0.39 % Th) From Sum REE Elements ( 7.70 % REE)
 

Zirconolite Classification

Help on  Dana Class: Dana Class: 08.02.05.05 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.02)where (A)2 (B2O6) (O,OH,F)
  (08.02.05)Zirconolite Group
 
08.02.05.01 Zirkelite (Ca,Th,Ce)Zr(Ti,Nb)2O7 F m3m 4/m 3 2/m
 
08.02.05.02 Zirconolite-3O (Ca,Fe,Y,Th)2Fe(Ti,Nb)3Zr2O7 C mca 2/m 2/m 2/m
 
08.02.05.03 Zirconolite-2M CaZrTi2O7 C 2/c 2/m
 
08.02.05.04 Zirconolite-3T CaZrTi2O7 P 312 3 2
 
08.02.05.05 Zirconolite (Ca,Ce)Zr(Ti,Nb,Fe)2O7 None
Help on  Strunz Class: Strunz Class: 04.DH.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DH -With large (� medium-sized) cations; sheets of edge-sharing octahedra
 
04.DH.30 Zirconolite-3O (Ca,Fe,Y,Th)2Fe(Ti,Nb)3Zr2O7 C mca 2/m 2/m 2/m
 
04.DH.30 Zirconolite-3T CaZrTi2O7 P 312 3 2
 
04.DH.30 Zirconolite-2M CaZrTi2O7 C 2/c 2/m
 
04.DH.30 Zirconolite (Ca,Ce)Zr(Ti,Nb,Fe)2O7 None
 

Other Zirconolite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Zirconolite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - Uranium Minerals
14 - WWW-MINCRYST

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Print or Cut-and-Paste your Zirconolite Specimen Label here :

Zirconolite

(Ca,Ce)Zr(Ti,Nb,Fe+++)2O7
Dana No: 08.02.05.05 Strunz No: 04.DH.30
Locality:

 

Notes:

 

 
   
 


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