نتایج جستجو برای: arsenates
تعداد نتایج: 96 فیلتر نتایج به سال:
A structural-magnetic models of the orthorhombic and triclinic modifications arsenates Cu4O(AsO4)2 isotypic phosphates Cu4O(PO4)2 has been built analyzed. Their base elements are complicated ribbons composed antiferromagnetic Cu4 tetrahedra. Structurally, these tetrahedra have no shared copper atoms; however, there strong (AFM) ferromagnetic (FM) couplings between them, both within them. It est...
Experimental studies increasingly often report low-temperature (200–800 °C) and low-pressure (0.05–3 kbar) hydrosilicate fluids with >40 wt.% of SiO2 >10 H2O. Compositionally similar were long suggested to potentially exist in natural systems such as pegmatites hydrothermal veins. However, they are rarely invoked recent petrogenetic models, perhaps because the scarcity direct evidence for...
چکیده ندارد.
Kolicite, MnrZno(Aso4)r(sio4)r(oH)*, is a new mineral found in the Sterling Hill mine, ogdensburg, Sussex county, New Jersey. Kolicite is orthorhombic, space group Cmca, with a : 18.59(3), D : 8.789(5) and c: 12.04(l)A, V: l96j.lA3, Z:4. The six strongest l ines in the X-ray diffraction pauern (d n A, intensity, hkt) are:2.9j 100 023,512: 1.540 70 552, 5l:-. 644,842' 915; 3.58 60 rr3;2.608 50 5...
Arsenopyrite-rich wastes from abandoned tungsten and tin exploitations were studied to determine the composition and characteristics of the secondary phases formed under natural weathering conditions so as to assess their potential environmental risk. Representative weathered arsenopyrite-bearing rock wastes collected from the mine dumps were analysed using the following techniques: X-ray powde...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید