Results 41 to 50 of about 614 (173)

Metallogeny in the Bangong–Nujiang belt, central Tibet, China: A review

Frontiers in Earth Science, 2023
The Bangong–Nujiang metallogenic belt consists of scattered Tethyan oceanic blocks, mainly distributed underneath the margins of the Qiangtang and Lhasa terranes in central Tibet.
Yang Song, Juxing Tang, Bin Lin, Bin Lin, Chao Yang, Chao Yang, Hao Sun   +6 more
doaj   +1 more source

Formation and Alteration of Magnesite Nodules From Kunwarara, Queensland, Australia, as an Analog to Mg‐Carbonate Formation on Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Magnesite (MgCO3) is a magnesium (Mg) carbonate mineral that records the aqueous environmental conditions of its formation. On Earth, magnesite forms in metamorphic, diagenetic or pedogenic environments, and distinguishing between these environments is critical for understanding the fluid chemistry during magnesite precipitation. Mg carbonates
E. L. Cardarelli, T. M. Present, P. M. Vasconcelos, L. C. Kah, C. Swindle, S. Bhattacharjee, K. Farley   +6 more
wiley   +1 more source

Phase Equilibria in the FeO–Fe2O3–Sb2O3–Sb2O5–SiO2 System in Equilibrium With Metal and in Air/Oxygen Atmosphere

Journal of the American Ceramic Society, Volume 109, Issue 9, September 2026.
ABSTRACT Experimental study and thermodynamic modeling of the phase equilibria in the FeO–FeO1.5–SbO1.5–SbO2.5–SiO2 system in air and 1 atm oxygen, and in equilibrium with Sb/Sb–Ag metal has been undertaken. Experimental data at 575°C–1600°C were obtained using high‐temperature equilibration of mixtures in sealed silica ampoules, Fe3O4 basket/MgO ...
Hamed Abdeyazdan, Maksym Shevchenko, Evgueni Jak   +2 more
wiley   +1 more source

Nature, origin, and phosphorylation potential of the phosphorus/sulfur‐bearing nanoscale multiphasic assemblages in the CM chondrites Murchison and Murray

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2303-2335, September 2026.
Abstract Carbonaceous chondrites contain phosphorus, whose speciation and thus history remain to be investigated. Phosphorus/sulfur‐bearing assemblages have been reported in carbonaceous CM chondrites, but there is no consensus about their exact compositions and origins.
Valentine Megevand, Sylvain Bernard, Corentin Le Guillou, Roberto Conconi, François Guyot   +4 more
wiley   +1 more source

Solid propellant burn rate characterization: Effect of copper chromite blend with oxidiser and its storage

FirePhysChem
This work details the study conducted on composite solid propellants with activated copper chromite (ACR) as burn catalyst for its burn rate change with time due to the interaction of ammonium perchlorate (AP) with ACR.
Sathiskumar PS, Alok Kumar Patel, Vinay Paliwal, Sojan P   +3 more
doaj   +1 more source

Characterization of coesite‐bearing impact melt glass from the Hapcheon crater, Korea: Trimodal phase architecture, shock metamorphism, and implications for 40Ar/39Ar geochronology

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2233-2257, September 2026.
Abstract We present the first micrometer‐scale, phase‐resolved compositional characterization of impact melt glass from the Hapcheon crater (~1.4 km apparent diameter), the first confirmed impact structure on the Korean Peninsula, integrating EPMA‐WDS (5 μm spot), confocal Raman spectroscopy (<1 μm spot), XRD, and 40Ar/39Ar step‐heating geochronology ...
Jin‐Young Lee, Jeongmin Kim, Sei‐Sun Hong   +2 more
wiley   +1 more source

Recycling End‐of‐Life Solid Oxide Cell Interconnect Assemblies into Commercial‐Grade AISI 304 Stainless Steels

steel research international, Volume 97, Issue 8, Page 4363-4381, August 2026.
This study validates a recycling pathway for converting interconnect assemblies from end‐of‐life SOC stacks into commercial‐grade AISI 304 steels. Using scrap‐based steelmaking operations, austenitic cast steels with <4.0% δ‐ferrite are successfully produced.
Jeraldine Lastam, Shine‐Od Mongoljiibuu, Alexander Specht, Daniel Grüner, Dmitry Sergeev, Urs A. Peuker, Michael Müller, Ruth Schwaiger   +7 more
wiley   +1 more source

Activities of Copper Chromite Catalysts for Dehydrogenation of Ethanol

The Journal of the Society of Chemical Industry, Japan, 1970
脱水素用亜クロム酸銅系触媒の活性究明の一助とするために, 純エタノールの脱水素反応に対して, 細孔内拡散の影響度を考慮した速度評価を行なった。すなわち, 工業用円柱触媒 [A,(CuO-Cr2[CuO4]系);径:0.490～0.495cm, 高さ:0.217～0.407cmとG-13,(Cr2[CuO4]系);径:0.476～0.479cm, 高さ:0.215～0.285cm]のそれぞれ, 代表寸法(ΣVpi/ΣSOi;ΣVpi:見かけ容積の和,ΣS0i:見かけ外表面積の和)の異なるものに対して, 触媒Aは 200～300℃で, 触媒 G-13 は 200～350℃ で, 常圧・等温流通系操作によって, 触媒見かけ単位容積当りおよび単位質量当りの, 外部抵抗の無視できる場合の定常速度 (ra ...
Shigeaki KASAOKA, Ryohei KASHIHARA, Haruhiko IWATSUBO   +2 more
openaire   +2 more sources

The Structure of Spinels: A Quantitative Assessment of the AB2X4 Family

Journal of the American Ceramic Society, Volume 109, Issue 8, August 2026.
ABSTRACT Compounds with the general formula AB2X4 crystallize with the atomic structure of the mineral spinel, MgAl2O4, described by three degrees of freedom: lattice parameter a, anion parameter u, and cation inversion parameter λ. Here, bond valence sum validation of 1244 ambient structures (338 compositions, 1915–2025) from the Inorganic Crystal ...
Nik Reeves‐McLaren
wiley   +1 more source

Optimization of Synergistic Reduction of Copper Smelting Slag and Chromite for Production of Cu-Cr-Fe Master Alloys

Metals
Cu and Cr are the essential alloying elements for low-Ni stainless steels. An effective and economical method has been developed for the direct production of Cu-Cr-Fe master alloys through the synergistic reduction of chromite and copper smelting slag ...
Yaoan Xi, Yi Qu, Sui Xie, Jinfa Liao, Baojun Zhao   +4 more
doaj   +1 more source