نتایج جستجو برای: sub hemirings

تعداد نتایج: 208295  

Journal: :Powder Diffraction 2023

The crystal structure of meglumine diatrizoate has been solved and refined using synchrotron X-ray powder diffraction data optimized density functional theory techniques. Meglumine crystallizes in space group P2 1 (#4) with a = 10.74697(4), b 6.49364(2), c 18.52774(7) Å, β 90.2263(3), V 1292.985(5) Å 3 , Z 2. Two different structures, which yielded essentially identical refinement residuals pos...

Journal: :Fizika tverdogo tela 2021

Crystals of Pb3Mn7O15 doped with titanium ions have been synthesized. The study the structural properties showed that occupy positions in “columns” between planes, which leads to a weakening exchange interaction planes. temperature dependences magnetization and heat capacity revealed two anomalies at 62 K 35 K. At K, long-range magnetic order presumably appears, spin-reorientation transition oc...

Journal: :European Journal of Mineralogy 2023

Abstract. Pleysteinite, [(H2O)0.5K0.5]2Mn2Al3(PO4)4F2(H2O)10 ⚫ 4H2O, is the aluminium analogue of benyacarite, from Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany. It was found in specimens altered zwieselite, association with nordgauite, fluellite, rockbridgeite, pyrite and columbite. Pleysteinite occurs as isolated small aggregates colourless, stubby prisms that are typically 10 to 30 µ...

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