Results 31 to 40 of about 839 (198)

Synthesis, crystal structure and structure–property relations of strontium orthocarbonate, Sr2CO4

Acta Crystallographica Section B, Volume 77, Issue 1, Page 131-137, February 2021., 2021
A new orthocarbonate, Sr2CO4, was synthesized under extreme pressure and temperature conditions of 92 GPa and 2500 K, respectively. The crystal structure of the compound s fully characterized in situ by synchrotron single‐crystal X‐ray diffraction and DFT calculations were employed to provide insight into its equation of state, Raman and IR spectra ...
Dominique Laniel, Jannes Binck, Björn Winkler, Sebastian Vogel, Timofey Fedotenko, Stella Chariton, Vitali Prakapenka, Victor Milman, Wolfgang Schnick, Leonid Dubrovinsky, Natalia Dubrovinskaia   +10 more
wiley   +1 more source

Antioxidant, Cytotoxic, and Antibacterial Activities of the Selected Tibetan Formulations Used in Gandaki Province, Nepal

Evidence-Based Complementary and Alternative Medicine, Volume 2021, Issue 1, 2021., 2021
Background and Objective. Tibetan medicine is one of the earliest‐known traditional medicines. This study aimed to evaluate the antioxidant, cytotoxic, and antibacterial potential of ethanolic extracts of nine common Tibetan formulations. Materials and Methods.
Madan Dhakal, Prakash Poudel, Upma Jha, Suresh Jaiswal, Khem Raj Joshi, Mohammad Hashem Hashempur   +5 more
wiley   +1 more source

Synergistic activation of smithsonite with copper-ammonium species for enhancing surface reactivity and xanthate adsorption

International Journal of Mining Science and Technology, 2023
Copper ions (Cu2+) are usually added to activate the sulfidized surface of zinc oxide minerals to enhance xanthate attachment using sulfidization xanthate flotation technology.
Wenjuan Zhao, Bin Yang, Yahui Yi, Qicheng Feng, Dianwen Liu   +4 more
doaj   +1 more source

Smithsonite

ZnCO3 - Mohs Hardness: 4 - 5. Smithsonite is named for James Smithson, the founder of the Smithsonian Institution. The luster of smithsonite sets it apart from other minerals: it has a silky to pearly luster giving natural specimens a certain play of ...
Wolf, Ron
core   +5 more sources

Ore control factors of Zinc and Lead mineralization in the Tangedozdan area (NE Fereydounshahr-Isfahan Province)

Journal of Economic Geology, 2023
The Tangedozdan area is located in the west of Isfahan province and 25 km northeast of Fereydounshahr. Structurally, this area is located in the Sanandaj- Sirjan zone. The rock units include greenish volcanic rocks, lime-sandstone, limestone to dolomitic-
Behrooz Amiri, Seyed Vahid Shahrokhi
doaj   +1 more source

Thermal analysis of smithsonite and hydrozincite [PDF]

Journal of Thermal Analysis and Calorimetry, 2008
Thermogravimetric analysis of synthetic smithsonite and hydrozincite, two secondary minerals of zinc, was used to determine their relative thermal stability. Thermal decomposition of smithsonite occurs at 293°C and hydrozincite at 220°C showing that the carbonate mineral is more stable than the hydroxy-carbonate mineral hydrozincite.
Frost, Ray, Hales, Matt
openaire   +2 more sources

Zinc K-edge XANES spectroscopy of mineral and organic standards. [PDF]

J Synchrotron Radiat, 2019
Zinc K‐edge XANES reference standards of zinc mineral samples and organic compounds are presented.Zinc K‐edge X‐ray absorption near‐edge (XANES) spectroscopy was conducted on 40 zinc mineral samples and organic compounds. The K‐edge position varied from 9660.5 to 9666.0 eV and a variety of distinctive peaks at higher post‐edge energies were exhibited ...
Castorina E, Ingall ED, Morton PL, Tavakoli DA, Lai B.   +4 more
europepmc   +2 more sources

Genesis of Tozlou Pb-Zn Occurrence (South of Zanjan): Evidence from Geology, Mineralization, and Geochemistry

Journal of Economic Geology, 2023
Tozlou Pb-Zn mineralization, ~250-300m long, and ~50m thick, is hosted by limestone units of the Qom Formation. The main mineralization zone occurred as vein-veinlets and vug infill textures, where mineralization is observed as Pb-Zn-bearing barite veins
Hamed Daneshvar, Hossein Kouhestani, Mir Ali Asghar Mokhtari, Afshin Zohdi   +3 more
doaj   +1 more source

Precipitation as the main mechanism for Cd(II), Pb(II) and Zn(II) removal from aqueous solutions using natural and activated forms of red mud

Environmental Advances, 2021
The red mud (RM) has been used as an alternative low-cost adsorbent to remove trace elements, with the adsorption onto sodalite surface described as the main removal mechanism for trace elements.
Fabiano Tomazini da Conceição, Mariana Scicia Gabriel da Silva, Amauri Antonio Menegário, Maria Lucia Pereira Antunes, Guillermo Rafael Beltran Navarro, Alexandre Martins Fernandes, Caetano Dorea, Rodrigo Braga Moruzzi   +7 more
doaj   +1 more source

Smithsonite flotation with lauryl phosphate

Minerals Engineering, 2020
Abstract Smithsonite, the most abundant nonsulfide zinc mineral, has attracted growing attention due to the demand for zinc and the exhaustion of traditional sulfide zinc resources. Traditional flotation techniques are not efficient and do not easily separate smithsonite from other carbonate minerals, such as calcite. In this regard, lauryl phosphate
Weiping Liu, Zuoxing Wang, Xuming Wang, Jan D. Miller   +3 more
openaire   +2 more sources