Zirconolite-3T Mineral Data

General Zirconolite-3T Information

Chemical Formula:

CaZrTi2O7

Composition:

Molecular Weight = 339.06 gm

Calcium 11.82 % Ca 16.54 % CaO

Zirconium 26.91 % Zr 36.34 % ZrO₂

Titanium 28.24 % Ti 47.12 % TiO₂

Oxygen 33.03 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaZrTi₂O₇

IMA Status:

Approved IMA 1989

Locality:

Walaweduwa, Bambarabotuwa district, Sabaragamuwa, Sri Lanka. Link to MinDat.org Location Data.

Name Origin:

Named after its composition and crystal structure.

Name Pronunciation:

Zirconolite-3T + Pronunciation

Synonym:

Zirkelite

Zirconolite-3T Image

Images:

Zirconolite-3T

Comments: Dark brown platy hexagonal zirconolite=3Tcrystals on sanidine.
Location: Castellaccio di Petrignano near Vetrella, Lazio,Viterbo, Italy. Scale: Specimen Size 3x4 cm.
© Diederik Visser

Zirconolite-3T Crystallography

Axial Ratios:

a:c = 1:2.31727

Cell Dimensions:

a = 7.287, c = 16.886, Z = 7; V = 776.52 Den(Calc)= 5.08

Crystal System:

Trigonal - TrapezohedralH-M Symbol (3 2) Space Group: P 3₁2

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

By Intensity(I/I_o): 2.98(1), 1.82(0.5), 1.75(0.3),2.53(0.3), 2.84(0.2), 1.51(0.1), 1.525(0.1), 2.3(0.1),

Crystal Structure:

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Grey I E , Mumme W G , Ness T J , Roth R S , Smith K L , Journal of Solid State Chemistry , 174 (2003) p.285-295, Structural relations between weberite and zirconolite polytypes -, refinements of doped 3T and 4M Ca2Ta2O7 and 3T CaZrTi2O7, Locality: synthetic

Physical Properties of Zirconolite-3T

Color:

Black, Brownish black.

Density:

4.7

Diaphaneity:

Opaque

Fracture:

Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Hardness:

5.5 - Knife Blade

Luster:

Resinous

Streak:

reddish brown

Optical Properties of Zirconolite-3T

Optical Data:

Uniaxial (?).

NCalc= 2.51 - from Gladstone-Dale relationship (KC = 0.2966) where Ncalc=Dcalc*KC+1
NCalc= 2.39 - from Gladstone-Dale relationship (KC = 0.2966) where Ncalc=Dmeas*KC+1

Calculated Properties of Zirconolite-3T

Electron Density:

Bulk Density (Electron Density)=4.79 gm/cc
note: Specific Gravity of Zirconolite-3T =5.08 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_{Zirconolite-3T}= 42.93 barns/electron
U=PE_{Zirconolite-3T} x rElectron Density= 205.81 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zirconolite-3T is Not Radioactive

Zirconolite-3T Classification

Dana Class:

08.02.05.04 (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

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-3T Information

References:

NAME( Dana8) PHYS. PROP.(Dana8)

See Also:

Links to other databases for Zirconolite-3T :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Print or Cut-and-Paste your Zirconolite-3T Specimen Label here :

Zirconolite-3T

CaZrTi2O7
Dana No: 08.02.05.04 Strunz No: 04.DH.30
Locality:

Notes: