Zirconolite-3O Mineral Data

Zirconolite-3O Mineral Data +

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General Zirconolite-3O Information

Chemical Formula:

(Ca,Fe,Y,Th)2Fe(Ti,Nb)3Zr2O7

Composition:

Molecular Weight = 385.57 gm

Calcium 9.35 % Ca 13.09 % CaO

Yttrium 0.46 % Y 0.59 % Y₂O₃

Thorium 3.61 % Th 4.11 % ThO₂

Zirconium 26.03 % Zr 35.15 % ZrO₂

Titanium 13.66 % Ti 22.79 % TiO₂

Niobium 12.05 % Nb 17.23 % Nb₂O₅

Iron 5.79 % Fe 1.86 % FeO / 6.21 % Fe₂O₃

Oxygen 29.05 % O

______ ______

100.00 % 101.04 % = TOTAL OXIDE

Empirical Formula:

Ca_0.9Fe²⁺_0.1Y_0.02Th_0.06Zr_1.1Fe³⁺_0.3Ti_1.1Nb_0.5O₇

Environment:

In sanidinite.

IMA Status:

Valid Species (Pre-IMA) 1828

Locality:

Monte di Procida, Campi Felgrei, Campania, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for its composition.

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Zirconolite-3O Crystallography

Axial Ratios:

a:b:c =0.7173:1:0.5144

Cell Dimensions:

a = 10.148, b = 14.147, c = 7.278, Z = 8; V = 1,044.86 Den(Calc)= 4.90

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mca

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.97(1), 1.82(0.5), 1.55(0.4),2.57(0.3), 1.18(0.2), 1.05(0.1), 1.15(0.1), 1.49(0.1),

Physical Properties of Zirconolite-3O

Cleavage:

[???] Indistinct

Color:

Dark red, Brown.

Density:

4.7

Diaphaniety:

Opaque

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

5.5 - Knife Blade

Luster:

Resinous

Streak:

dark brown

Optical Properties of Zirconolite-3O

Optical Data:

Biaxial (?)

NCalc= 2.3 - from Gladstone-Dale relationship (KC = 0.2648) where Ncalc=Dcalc*KC+1
NCalc= 2.24 - from Gladstone-Dale relationship (KC = 0.2648) where Ncalc=Dmeas*KC+1

Calculated Properties of Zirconolite-3O

Electron Density:

r_electron=4.56 gm/cc
note: r_{Zirconolite-3O}=4.90 gm/cc.

Fermion Index

Fermion Index = 0.04835
Boson Index = 0.95165

Photoelectric:

PE_{Zirconolite-3O}= 141.90 barns/electron
U=PE_{Zirconolite-3O} x r_electron= 646.62 barns/cc.

Radioactivity:

GRapi = 71,633.69 (Gamma Ray American Petroleum Institute Units)

Zirconolite-3O 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) 424.61 ±106.15 grams of pure Zirconolite-3O .

**Estimated Radioactivity from Zirconolite-3O** - weak
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 / 7.30 cm	1,617,638	4.37E-05	71,633.69	23.55
100 gm / 3.39 cm	161,764	4.37E-06	7,163.37	2.36
10 gm / 1.57 cm	16,176	4.37E-07	716.34	0.24
1 gm / 7.30 mm	1,618	4.37E-08	71.63	0.02
0.1 gm / 3.39 mm	162	4.37E-09	7.16	0.00
0.01 gm / 1.57 mm	16	4.37E-10	0.72	0.00
0.001 gm / 0.73 mm	2	4.37E-11	0.07	0.00

Weight of pure Zirconolite-3O in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.90 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

Zirconolite-3O Classification

Dana Class:

8.2.5.2 (8)Multiple Oxides with Nb, Ta, and Ti

(8.2)where (A)2 (B2O6) (O,OH,F)

(8.2.5)Dana Group

8.2.5.1 Zirkelite (Ca,Th,Ce)Zr(Ti,Nb)2O7 F m3m 4/m 3 2/m

8.2.5.2 Zirconolite-3O (Ca,Fe,Y,Th)2Fe(Ti,Nb)3Zr2O7 C mca 2/m 2/m 2/m

8.2.5.3 Zirconolite-2M CaZrTi2O7 C 2/c 2/m

8.2.5.4 Zirconolite-3T CaZrTi2O7 P 3₁2 3 2

8.2.5.5 Zirconolite (Ca,Ce)Zr(Ti,Nb,Fe)2O7 None

Strunz Class:

IV/C.15-20** IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.15 - Pyrochlore group, Zirkelite - Zirconolite series

IV/C.15-10 Zirkelite (Ca,Th,Ce)Zr(Ti,Nb)2O7 F m3m 4/m 3 2/m

IV/C.15-20 Zirconolite (Ca,Ce)Zr(Ti,Nb,Fe)2O7 None

IV/C.15-20* Zirconolite-2M CaZrTi2O7 C 2/c 2/m

IV/C.15-20** Zirconolite-3O (Ca,Fe,Y,Th)2Fe(Ti,Nb)3Zr2O7 C mca 2/m 2/m 2/m

IV/C.15-20*** Zirconolite-3T CaZrTi2O7 P 3₁2 3 2

Other Zirconolite-3O Information

References:

NAME( Dana8) PHYS. PROP.(MinRec)

See Also:

Links to other databases for Zirconolite-3O :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Zirconolite-3O

(Ca,Fe,Y,Th)2Fe(Ti,Nb)3Zr2O7
Dana No: 8.2.5.2 Strunz No: IV/C.15-20**
Locality:

Notes: