Zirconolite experiments on the stability in hydrothermal fluids by Jan Christian Malmström

Cover of: Zirconolite | Jan Christian Malmström

Published by Schweizerische Geotechnische Kommission in Zürich .

Written in English

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Subjects:

  • Hydrothermal deposits

Edition Notes

Book details

StatementJan Christian Malmström.
SeriesBeiträge zur Geologie der Schweiz. Geotechnische Serie -- Lieferung 93 = -- Matériaux pour la géologie de la Suisse. Série géotechnique
Classifications
LC ClassificationsQE390.5 .M35 2000
The Physical Object
Pagination130 p :
Number of Pages130
ID Numbers
Open LibraryOL24072603M
ISBN 103907997263
LC Control Number2008395774

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Zirconolite CaZrTi2O7 Zirconolite book Mineral Data Publishing, version 1 Crystal Data: Monoclinic; hexagonal; orthorhombic; commonly metamict.

Point Group. & Sweetapple, M. Zirconolite, zircon and monazite-(Ce) U-Th-Pb age constraints on the emplacement, deformation and alteration history of the Cummins Range Carbonatite Complex, Halls Creek Orogen, Kimberley region, Western Australia.

Mineralogy and Petrology, (), Kalgoorlie-Boulder Shire; Kalgoorlie-Boulder. Zirkelite (Ca,Th,Ce)Zr(Zr,Ti)2O7 c Mineral Data Publishing, version 1 Crystal Data: Cubic; commonly metamict.

Point Group: 4/m32/m. Crystals are flattened octahedra, to 3 cm. Twinning: On {}, very common, as complex fourlings and polysynthetic. Physical Properties: Fracture: Conchoidal.

Tenacity: Brittle. Hardness =   Zirconolite-Rich Ceramics for Actinide Wastes - Volume - Eric R Vance, B. Begg, R. Day, C. Ball Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our by: The Pala Bora zirconolite is largely amorphous but contains isolated domains (50 to A) of crystalline material which may be the result of post-metamict recrystallization and alteration.

The only other significant evidence for chemical alteration Zirconolite book the lower ThO/sub 2/ concentration (1 to 2 weight percent) and slightly lower analytic. The text also talks about end uses of zirconia along with its price.

The book will be of great interest to professionals who are involved in the zirconia industry. Show less. Zirconia, 3rd Edition, Volume 1 provides a comprehensive coverage of the various areas of concerns in the zirconia industry.

The title first covers the various forms of. A compilation of the chemical data and brief review of the mineral zirconolite, essentially CaZrTi, is presented. A total of chemical analyses, previously unpublished, from 39 of the 46 known terrestrial localities, and covering IO rock types are tabulated.

A brief description of the minerals associated with zirconolite is outlined for each by: Zirconolite, ideally CaZrTi 2 O 7, is known in several polytypoids, such as zirconolite-3O (orthorhombic), zirconolite-3T (trigonal), zirconolite-2M (monoclinic) and non-crystalline (metamict) or.

The structural behavior of zirconolite (CaZrTi 2 O 7) under reducing conditions at high temperature has been studied, mainly by scanning electron microscopy (SEM) and x-ray Zirconolite book (XRD), but also with x-ray absorption spectroscopy, thermogravimetry, and electron paramagnetic partial reduction of Ti 4+ to Ti 3+, associated with a reducing atmosphere heat Cited by: PE Zirconolite = barns/electron U=PE Zirconolite x r electron = barns/cc.

Radioactivity: GRapi = 7, (Gamma Ray American Petroleum Institute Units) Concentration of Zirconolite per GRapi unit = (PPM) Zirconolite is Radioactive as defined in 49 CFR Greater than 70 Bq /. A series of zirconolite ceramics with nominal stoichiometry CaZr 1-x Ce x Ti 2 O 7 ( ≤ x ≤ ) were synthesised under oxidizing, inert and reducing conditions, by a conventional solid-state cold press and sinter method.

The evolution of phase assemblage and microstructure were characterized by XRD, SEM-EDS, Ce-L 3 XANES and Raman spectroscopy techniques. When incorporating actinides into zirconolite for high‐level radioactive waste immobilization, Al 3+ and Fe 3+ ions generally act as charge compensators.

In this study, we rationally designed a series of (Ln = La, Nd, Gd, Ho, Yb) to unravel the dopant solubility and evolutions of the crystalline phase and local environment of cations through synchrotron X‐ray : Shiyin Ji, Shiyin Ji, Minhua Su, Changzhong Liao, Shengshou Ma, Zhiguang Wang, Kaimin Shih, Chung‐Ka.

Zirconolite-3O mineral data, information about Zirconolite-3O, its properties and worldwide locations. U–Pb Dating of Zircon and Zirconolite Inclusions in Marble-Hosted Gem-Quality Ruby and Spinel from Mogok, Myanmar Author(s): M.M. Phyo H.A.O.

Wang M. Zirconolite, which is one of the most durable phases among Synroc minerals, has been extensively investigated as a ceramic matrice [24,25,26,27].Zirconolite exhibits a layered structure, which is formed by the stacking layers of edge shared Ti-O polyhedra (TiO 6 and TiO 5) and layers of Ca 2+ and Zr 4+ ions [25,26,27,28].Due to the composition and nature of substitution, zirconolite can Cited by: 1.

Zirconolite-based glass-ceramic is considered a promising wasteform for conditioning minor actinide-rich nuclear wastes.

Recent studies on this wasteform have sought to enhance the partitioning ratio (PR) of minor actinides in zirconolite crystal. To optimize the PR in the SiO2–Al2O3–CaO–TiO2–ZrO2 system, a novel conceptual approach, which can be derived from the Cited by: 4.

Materials adopting the zirconolite-type structure have been investigated previously for use in many applications, including for the sequestration of nuclear waste. However, these materials are often formed using high-temperature methods (e.g., °C), which are not easy to scale up to produce large quantit.

Synroc is recognized as the second-generation waste matrice for nuclear waste disposal. Zirconolite is one of the most durable Synroc minerals. In this study, Gd and Hf were selected as the surrogates of trivalent and tetravalent actinide nuclides. Gd-bearing Hf-zirconolite (Ca1−xHf1−xGd2xTi2O7) ceramic waste forms were rapidly synthesized from a self-propagating technique using CuO as the Cited by: 1.

Zirconolite was chosen as the target ceramic wasteform for this work. We elected to substitute formula units of Ce, targeted as Ce 4+, on the Ca‐site, with co‐substitution of Fe 2/3+ (supplied as Fe 3 O 4) for charge balancing via substitution on the Ti‐ by: 4.

Safe and effective management of nuclear waste provides a broad range of challenges for materials science. Waste processing, waste form and engineered barrier properties, interactions between engineered and geological systems, radiation effects, chemistry and transport of waste species, and long-term predictions of repository performance are just some of the scientific problems facing modern Format: Hardcover.

A comprehensive study on the aqueous stability of Ce- and Pu-doped zirconolite has been performed. Four series of hydrothermal experiments were carried out with Ce-doped zirconolite powders: (1) a. Zirconolite: a review of localities worldwide, and a compilation of its chemical compositions THE NATURA C.T.

WILLIAMS HISTORY MUSEUM Depart,nent of Mineralogy, The Natural History Museun1. Cronell Road, London SW7 5BD, U 7 j U iiPRESENTED Mineralogisch-Petrographisches lnstifut der Universiiiit, nun1, CH   Naturally occurring mineral analogues to crystalline phases that are constituents or crystalline radioactive waste forms provide a basis for comparison by which the long term stability of these phases may be estimated.

The crystal structures and the crystal chemistry of the following natural analogues are presented: baddeleyite; hematite; nepheline; pollucite; scheelite; sodalite; spinel Cited by: COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Zirconolite An example of the element Thorium: Sample Image | Spin Video | QuickTimeVR Rotation; Zirconolite. Description from the source: Zirconolite var. Polymignite ((Ca Fe Y Th) (Nb Ti Ta Zr) O4 orth.), Stavern (Fredriksva"rn), Larvik, Vestfold, Norway. Black, fractured on matrix. 2,5x1,4x1,2 cm; 3 g.

Source: Simone Citon Contributor: John Gray. Zircon makes a nice gem but it's out of favor these days. Zircon—zirconium silicate or ZrSiO 4 —is a hard stone, ranking 7½ on the Mohs scale, but other stones are harder and its colors aren't ion has a slim dossier on zircon; one site says that it was reputed to "aid sleep, bring prosperity, and promote honor and wisdom," but hey, just having the money to own jewels is good Author: Andrew Alden.

Zirconolite, zircon and monazite-(Ce) U-Th-Pb age constraints on the emplacement, deformation and alteration history of the Cummins Range Carbonatite Complex, Halls Creek Orogen, Kimberley region, Western Australia.

Mineralogy and Petrology. (2): pp. Cited by: 8. Zirconolite enriched in rare earth elements—REE = Y + Lu+ΣLa-Yb (up to wt% REE 2 O 3, apfu REE) creates thin rims around spinel and magnetite grains, whereas zirconolite enriched in U and Th (up to wt% ThO 2 + UO 2, apfu Th + U) replace the Late Ediacaran ( Ma) zircon and baddeleyite along contacts with pyrrhotite.

Zircophyllite is a complex mineral, formula (K,Na) 3 (Mn,Fe) 7 (Zr,Ti,Nb) 2 Si 8 O 24 (OH,F) crystallizes in the triclinic - pinacoidal crystal class as dark brown to black micaceous plates.

It has perfect cleavage, a Mohs hardness of 4 to and a specific gravity of Its indices of refraction are nα= nβ= nγ= and it has a 2V optical angle of 62°.Category: Inosilicate. The challenges of nuclear waste. Karl Whittle Published June These are questions that could form the basis of a book in themselves, and in this chapter we shall discuss the issues more generally and see how they relate to the topics that we have already discussed.

pryochlore and zirconolite being known to contain U/Th, and so we. Zirconolite - Dark reddish anhedral crystal to 2mm in Aegerine. This and many more mineral specimens are available for sale at Dakota Matrix Minerals. Synthetic zirconolite, CaZrTi2O7, has attracted interest recently, as it has been proposed as a constituent phase of an artificial rock (SYNROC) which may immobilise, in solid solution, the Cited by: PE Zirconolite-2M = barns/electron U=PE Zirconolite-2M x rElectron Density= barns/cc.

Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units) Zirconolite. Other articles where Zirconolite is discussed: dating: Uranium–lead method: Today, however, baddeleyite (ZrO2) and zirconolite (CaZrTi2O7) have been found to be widespread in the silica-poor mafic igneous rocks.

In addition, perovskite (CaTiO3), a common constituent of some ultramafic igneous rocks, has been shown to be amenable to precise uranium–lead dating.

Zirconolite (CaZrTi 2 O 7) associated with baddeleyite (ZrO 2), thorianite (ThO 2), uraninite (UO 2), thorite or huttonite (ThSiO 4) and zircon (ZrSiO 4) has been discovered in chromitites of the Finero mantle-derived massif, in the Western Alps of “exotic” minerals do not occur in late veins or fractures; they are part of the accessory assemblage (phlogopite, amphibole, apatite Cited by: Nomenclature.

The International Mineralogical Association Commission on New Minerals and Mineral Names (CNMMN) adopted the name titanite and "discredited" the name sphene as ofalthough commonly papers and books initially identify the mineral using both names. Sphene was the most commonly used name until the IMA decision, although both were well ry: nesosilicate.

Abstract. In situ SHRIMP U-Pb dating of zirconolite in clinopyroxenite from the Cummins Range Carbonatite Complex, situated in the southern Halls Creek Orogen, Kimberley region, Western Australia, has provided a reliable Pb/ Pb age of emplacement of ± 16 Ma.

Variably metamict and recrystallised zircons from co-magmatic carbonatites, including a megacryst ~ cm long, gave a Cited by: 8. investigations of the properties of iron-enriched basalt with tio//2 and zro//2 additions.

In Wicks GG, Ross WA, editors, Advances in Ceramics. American Ceramic Soc Inc. Author: J. Conley, P. Kelsey, D. Miley. Zirconolite - Just a solid chunk of this uncommon zirconium-titanium oxide. A representative piece. This and many more mineral specimens are available for sale at Dakota Matrix Minerals.

Zircon and Zirconology - The Study of Zircon. Most gemstones were formed millions of years ago in the Earth. Indeed, the mineral zircon is a special case. The oldest known zircon samples, from Western Australia, are more than billion years old.

3 Waste Forms. The final charge of the statement of task for this study (see Box in Chapter 2) calls for the identification and description of “potential new waste forms that may offer enhanced performance or lead to more efficient production.”This chapter, which is written primarily for technical audiences, addresses this charge by providing a brief review of waste form materials and.Journal Article: Radiation Damage Effects in Candidate Titanates for Pu Disposition.

Zirconolite.Ziricote turns and finishes well, and in most instances, it can also be glued with no problems. (On rare occasions, the wood’s natural oils can interfere with the gluing process.) Odor: Ziricote has a mild, characteristic scent while being worked, somewhat similar to the smell of Pau Ferro.

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