Results 1 to 10 of about 16,574 (254)

Highly efficient inorganic-coated FeSiAl/biotite soft magnetic composites

Journal of Materials Research and Technology, 2022
FeSiAl/biotite soft magnetic composites were synthesized by mixing atomized FeSiAl and biotite at a specific mass ratio via ball milling. The structures, morphologies, elemental distributions, and magnetic properties of the FeSiAl/biotite composites were
Shoujin Zhu, Fei Duan, Shuangjiu Feng
exaly   +4 more sources

“Excess Ar” by laboratory alteration of biotite [PDF]

Geology, 2022
AbstractMany biotite phenocrysts from marine tephra layers have substoichiometric potassium concentrations and alkali occupation <<2.0 atoms per formula unit. Diagenetic alteration is an expected effect of exposure of fresh magmatic minerals to interstitial water and brine intrusions after the deposition and burial of sediments.
Villa, IM, Bosio, G
openaire   +3 more sources

Biotites and chlorites as interlayered biotite-chlorite crystal

Bulletin de Minéralogie, 1985
En microscopie électronique à transmission et de haute résolution, il est fréquemment observé dans les biotites et les chlorites qu'il y a en fait mélange de feuillets élémentaires de biotite et de chlorite. D'après la terminologie courante, ces cristaux sont des interstratifications biotite-chlorite.
Olives Baños, Juan
openaire   +3 more sources

Sorption of biotite

Forschungszentrum Karlsruhe. Wissenschaftliche Berichte, 2009
Gneissic rock types are common in the coastal regions of the Baltic Sea and in the area of the planned deep repository at Olkiluoto. Based on experimental data and molecular modelling of mineral surfaces, the chemical reactions governing the sorption of Ni(II) and Eu(III) were interpreted using well-established thermodynamic sorption models.
Puukko, E., Puhakka, E., Hakanen, M., Lindberg, A., Lehikoinen, J., Olin, Markus   +6 more
core   +5 more sources

A thermodynamic model for titanium and ferric iron solution in biotite

Journal of Metamorphic Geology, 2009
Recent crystallographic data indicate that in biotite Ti orders preferentially onto the M2 octahedral site rather than onto the M1 site as assumed in previous solution models for K(2)O-FeO-MgO-Al(2)O(3)-SiO(2)-H(2)O-TiO(2)-O(2) (KFMASHTO) biotite.
L Tajčmanová, James A D Connolly, Bernardo Cesare   +2 more
exaly   +2 more sources

Evaluation of anti-microbial activity of biotite and biotite composite based on crystallographic parameters: Estimation of crystallite size employing X-ray diffraction data

Results in Engineering
This study dealt with naturally occurring biotite from the river sediment to synthesize biotite based composite to evaluate antimicrobial activities against gram positive bacteria, negative bacteria and fungi.
Md Sahadat Hossain, Subarna Sandhani Dey, Md Ashraful Alam   +2 more
exaly   +3 more sources

GEOCHEMISTRY OF TRACE ELEMENTS IN ROCK-FORMING MINERALS OF GNEISSES AND GRANITES OF THE MURZINKA GRANITE AREA, CENTRAL URALS [PDF]

Минералогия, 2020
The Murzinka granite area (Central Urals), which combines Murzinka granite pluton and underlying rocks of the Murzinka-Adui metamorphic complex, exhibits an evident WE-trending geochemical zonation of magmatism with increasing of Rb, Li, Nb and Ta ...
S.V. Pribavkin, N.S. Borodina, M.V. Chervyakovskaya   +2 more
doaj   +1 more source

Potassium at the Origins of Life: Did Biology Emerge from Biotite in Micaceous Clay?

Life, 2022
Intracellular potassium concentrations, [K+], are high in all types of living cells, but the origins of this K+ are unknown. The simplest hypothesis is that life emerged in an environment that was high in K+.
Helen Greenwood Hansma
doaj   +1 more source

Petrology, geochemistry, source and tectonic setting of Malek Chah Ruii granitoid (East of Lut Block) [PDF]

پترولوژی, 2021
The Malek Chah Rouii granitoid pluton is exposed within the Deh-Salm metamorphic complex in the eastern margin of the Lut zone. The studied granitoid with peraluminous and calc-alkaline nature is composed of tonalite, granodiorite, and granite (monzo ...
Abadullah Toulabi Nejad, Ahmad Ahamadi Khalaji, Mohammad Ebrahimi, Habib Biabangard, Rasoul Esmaeili   +4 more
doaj   +1 more source

Geothermobarometry of Sarmeshk granitoids in the Northwest of Sarduiyeh [PDF]

پترولوژی, 2018
The Sarmeshk granitoid pluton is located in southeast of the Urumieh-Dokhtar magmatic zone in the Kerman province. Based on petrographic studies, the granitoid consist of three rock type of diorite, granodiorite and monzogranite. They are mainly composed
Asma Nazarinia, Seyed Mohsen Mortazavi, Mohsen Arvin, Mohammad Poosti   +3 more
doaj   +1 more source