نتایج جستجو برای: ilmenite

تعداد نتایج: 854  

Journal: :Minerals 2021

Ilmenite disseminated grain size is relatively fine, and it must be finely ground to fully separate ilmenite from gangue then produce fine-grained minerals, which deteriorates flotation. A novel method using buoyant carriers improve the recovery of fine in froth flotation was introduced this study. Hydrophobized glass bubbles (HGB) as carrier materials were obtained by an efficient, simple modi...

Journal: :Journal of Materials Chemistry C 2022

New high-pressure ordered-ilmenite and double-perovskite polymorphs of Mn 2 LiReO 6 are unprecedented A-site manganites with B/B? +/7+ oxidation states. They show cluster spin-cluster-glass behaviour giant coercivity without spin–orbit-coupling.

Journal: :Geobiology 2016
A Sabbatini A Negri A Bartolini C Morigi O Boudouma E Dinelli F Florindo R Galeazzi M Holzmann P C Lurcock L Massaccesi J Pawlowski S Rocchi

Benthic foraminifera are single-celled eukaryotes that make a protective organic, agglutinated or calcareous test. Some agglutinated, single-chambered taxa, including Psammophaga Arnold, 1982, retain mineral particles in their cytoplasm, but the selective mechanism of accumulation is not clear. Here, we report the ability of a foraminiferal species to select and accumulate zircons and other hea...

2004
ROGER H. MITCHELL RUSLAN P. LIFEROVICH

Ilmenite-group titanates are relatively common accessory minerals in agpaitic nepheline syenite (lujavrite) in the Pilansberg alkaline complex, South Africa. They crystallized in three generations and form a continuous ecandrewsite – pyrophanite solidsolution extending from (Zn0.81Mn0.12Fe0.07)TiO3 to (Mn0.93Fe0.7)TiO3. The earliest generation of ferroan manganoan ecandrewsite of widely varying...

2011
D. J. Burke

0019-1035/$ see front matter 2010 Elsevier Inc. A doi:10.1016/j.icarus.2010.11.007 ⇑ Corresponding author. Fax: +1 434 924 1353. E-mail address: [email protected] (R.A. Baragiola). Remote infrared spectroscopic measurements have recently re-opened the possibility that water is present on the surface of the Moon. Analyses of infrared absorption spectra obtained by three independent space instrum...

1999
L. Dobrzhinetskaya K. N. Bozhilov H. W. Green

One characteristic of many subduction zone garnet peridotites is that they contain titanium-bearing phases not otherwise Ž . found in mantle rocks. In particular, titanoclinohumite TiCH andror its breakdown assemblage consisting of symplectic intergrowths of olivine and ilmenite is common in many of these bodies. The Alpe Arami garnet lherzolite of the Lepontine Alps, while lacking TiCH, displa...

Journal: :Nanoscale 2015
Vasiliki Tileli Martial Duchamp Anna-Karin Axelsson Matjaz Valant Rafal E Dunin-Borkowski Neil McN Alford

The performance of complex oxide heterostructures depends primarily on the interfacial coupling of the two component structures. This interface character inherently varies with the synthesis method and conditions used since even small composition variations can alter the electronic, ferroelectric, or magnetic functional properties of the system. The focus of this article is placed on the interf...

2015
A. L. Fagan

This paper reports the detailed examination of three basalt clasts from Apollo 16 breccia 60639 that represent a new variant of high-Ti basalt returned from the Moon by the Apollo 16 mission. Mineral chemistry and whole-rock analyses were conducted on aliquots from three clasts (breccia matrix, basalt, and basalt + breccia matrix). The basalt clasts, which are not overtly porphyritic, contain c...

Journal: :Fuel Processing Technology 2022

Chemical looping combustion of wood pellets (WP), char (WC), and straw (SP) was conducted in a 60 kW CLC pilot with ilmenite braunite oxygen carriers (OCs). Alkali emissions were investigated impactor-based surface ionization detector (SID) measurements. Particle size distributions for WP WC fuels dominated by coarse particles formed refractory species. For SP fuel, the distribution bimodal dis...

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