...Ian E. Grey; Ernest H. Nickel Abstract Tivanite, V 4.37 Fe 0.14 Ti 3.49 O 11.49 (OH) 4.51 (ideal VTiO 3 OH), is a new mineral species that has been found in the “green leader” gold lodes at Kalgoorlie, Western Australia. Is is monoclinic with space group P 2 1 / c, a = 7.494(5), b = 4.552(4), c...

...F ig . 4. Interpretation of the structure of tivanite and kyzylkumite as derivatives of the rutile-structure type ( Grey and Nickel, 1981 ). Repeated antiphase operations ½[013](03İ1) (referring to the rutile structure-type) indicated by dashed lines lead to intercalated modular slices...

...F igure 10. ( a ) Schematic presentation of intrinsically twinned tivanite platelet and nucleation of rutile crystals in twinned orientation. ( b ) Dehydration of the tivanite platelet resulting in the nucleation of ilmenite lamella with the corundum structure as shown in ( c ). ...

... is isostructural with tivanite; their structural formulae are [ Ti 3 4 + □][ Ti 3 4 + Fe 3+ ]O 11 (OH) 5 and [ Ti 4 4 + ][ V 4 3 + ]O 12 (OH) 4 , respectively. Kleberite has dominant Ti 4+ in place of V 3+ in the M(2) metal-atom site. The related mineral pseudorutile, [Ti 4 ][(Fe 3+ ,Ti) 4 ](O,OH) 16 , with Fe 3...

... with a tivanite-type structure serves as a substrate for the topotaxial crystallization of rutile. Depending on the initial crystallization pattern the rutile can grow either as a single crystal or as a twin. During the progressive crystallization of the rutile Al-rich oxyhydroxide (diaspore, α-AlOOH) clusters...

...F ig . 3. Comparison of the crystal structures of a) rutile, b) olivine, c) humite, d) (Be,□)(V,Ti) 3 O 6 ( a horizontal, b vertical) and e) tivanite, represented by the coordination polyhedra of cations. Blue (and green in tivanite): coordination octahedra of Ti and V, red: coordination...

...F igure 6. Polyhedral representation of an (010) layer of the tivanite-type structural model for HPR. The light-shaded and dark-shaded octahedra correspond to M1 and M2, respectively, in Table 2 . ...

... . Raade and Balić-Žunić ( 2006 ) also included comparisons of the crystal structure of byrudite with those of rutile, olivine, humite and tivanite. Oxygen atoms in byrudite form a slightly distorted hexagonal eutaxy with close-packed layers parallel to (001). The two octahedrally coordinated sites...

... with lower iron content and higher water content than those reported by Grey and Reid (1975) as pseudorutile, an alteration of ilmenite. A detailed crystallographic study of samples from the Kalimantan ( Grey et al. 2010 ) showed kleberite to be a structural analogue of tivanite, V 3+ TiO 3 OH, and named...

... of Solid State Chemistry , 5 , 168 –173. Grey, I.E. and Nickel, E.H. ( 1981 ) Tivanite, a new oxyhydroxide mineral from Western Australia, and its structural relationship to rutile and diaspore. American Mineralogist , 66 , 866 –871. Grey, I.E. and Reid, A.F. ( 1972 ) Shear structure compounds...

... of tivanite Monoclinic: P 2 1 / n ; structure determined a  = 7.688(1), b  = 4.5267(7), c  = 7.443(1) Å, β = 97.62(1)° 3.846(100), 2.774(94), 2.616(70), 2.495(41), 2.184(37), 1.674(77), 1.654(34), 1.620(20) Type material is deposited in the mineralogical collections of the Geological Museum...