Results 1 to 10 of about 5,714 (305)
Crystals, 2022 Currently, most of the popular spinels in the jewellery market come from Myanmar and Tajikistan. It is well known that provenance is one of the main factors affecting the value of a gemstone, and the geographic origin of a gemstone can be determined by ...
Yi Zhang, Jing-Ran Zhu, Xiao-Yan Yu
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Distinction of Gem Spinels from the Himalayan Mountain Belt
CHIMIA, 2010 Gem spinel deposits in Myanmar, Vietnam and Tajikistan have their formation in association with Himalayan orogenesis. Gem-quality orange, pink, red and purple spinels from deposits at Mogok (Myanmar), Luc Yen (Vietnam), and Kuh-i-Lal (Tajikistan)
Anna Malsy, Leonhard Klemm
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Geosciences, 2022 In the Ordovician limestone of the Thorsberg quarry (South Sweden), about 130 meteorites have been found. Among the extraterrestrial material, several terrestrial Cr-spinels and zircons have been found too. In particular, in the interval 416–447 cm above
Davide Lenaz +3 more
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Characterization of Red, Pink, Orange, and Purple Gem-Quality Spinel from Four Important Areas
Crystals, 2023 Spinel is a precious stone with a long history. In ancient societies spinel was considered to be an imitation of ruby. With the depletion of ruby mineral resources, gem—grade spinel has attracted more and more attention from consumers. In the last decade,
Qian Xu, Bo Xu, Yujie Gao, Siying Li
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Processing and Investigation of Cd0.5Zn0.5Fe2−xCrxO4 (0 ≤ x ≤ 2) Spinel Nanoparticles
Crystals, 2023 This study presents the synthesis of Cd0.5Zn0.5Fe2−xCrxO4 nanoparticles via the sol–gel method, along with a comprehensive characterization of their morphological, structural, infrared, and magnetic properties.
Reem Khalid Alharbi +7 more
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Characterization of Cu-doped (Ni,Mn)3O4 thin films annealed at low temperatures
Journal of Asian Ceramic Societies, 2020 Negative-temperature coefficient of resistance (NTCR) thin films were prepared from (Ni0.2Mn2.8-xCux)Cl2 (0.010 ≤ x ≤ 0.040) solutions by liquid flow deposition (LFD) method.
Duc Thang Le, Jeong Ho Cho, Heongkyu Ju
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Journal of Materials Research and Technology, 2020 We explored electronic spin-dependent physical aspects of ferromagnetic HgCr2Z4 (Z = S, Se) spinels using density functional theory (DFT) for spintronic and energy storage applications.
Asif Mahmood +4 more
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Journal of Materials Research and Technology, 2020 By using WIEN2k code, we investigated the mechanical and thermoelectric properties of magnesium based MgX2O4 (X = Rh and Bi) spinels. To compute the mechanical behavior of MgX2O4 (X = Rh and Bi), the Perdew-Bruke-Ernzerhof (PBEsol) flavor of generalized ...
Farzana Majid +6 more
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Geosciences, 2017 Cr-spinels from ultramafic rocks from Lokris (Megaplatanos and Tragana), and Beotia (Ypato and Alyki) ophiolitic occurrences were studied. These rocks comprise principally harzburgite with minor dunite. Small amounts of clinopyroxene-rich harzburgite and
Panagiotis Pomonis, Andreas Magganas
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Energies, 2023 The (Cu,Mn,Co)3O4 (CMC) spinel layer is useful in inhibiting Cr vaporization that deteriorates the solid oxide fuel cell performance. The effectiveness of the spinel layer in suppressing volatile Cr species from the metallic interconnects is strongly ...
Joelle C. W. Mah +4 more
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