Both of these complexes contain pyrochlore
and their SrO content of carbonate minerals ranges from 0.74-3.94 wt.% and 0.12-1.55 wt.% in Leo-Shilman and Sellai Pattai, respectively, consistent with igneous origin for the carbonates of the carbonatites.
The problem of the synthesis consists in avoiding the formation of the undesired pyrochlore
phases--[Pb.sub.1.45][Nb.sub.2][O.sub.6.26] or Ti([Ni.sub.1/3][Nb.sub.2/3])[O.sub.4] .
Through an increase in the compositions [Pr.sub.6][O.sub.11] concentration, a decrease in the cassiterite phase (Sn[O.sub.2]) and an increase in the [Pr.sub.2][Sn.sub.2][O.sub.7] pyrochlore
Srivastava, "On the luminescence of [Bi.sup.3+] in the pyrochlore
[Y.sub.2][Sn.sub.2][O.sub.7]," Materials Research Bulletin, vol.
In order to decrease volatilization of Pb and eliminate the formation of the pyrochlore
phase in PZT thin films, the annealing treatment was implemented in the air with a rapid thermal process at 500[degrees]C, 600[degrees]C, and 700[degrees]C.
Bismuth oxide based pyrochlore
materials are of interest for decoupling capacitors, wireless communications, and low-fired high-frequency filter applications due to their dielectric properties.
Attributes/comments: Niobium Tin Pyrochlore
(NTP) Yellow is a new class of Complex Inorganic Colored Pigment (CICP) under Pigment Yellow 227 that breaks that compromise with excellent durability, high opacity and bright clean yellow color.
No undesirable peak of pyrochlore
phase appears in the XRD patterns of PZT films annealed at 700[degrees]C, which implies that PZT films are well crystallized with perovskite structure with preferred orientation of (111) peak at 2[theta] = 38.20.
An example is the formation of a PT phase with the pyrochlore
structure observed during a coprecipitation synthesis experiment .
Moon, "NO decomposition over the electrochemical cell of lanthanum stannate pyrochlore
and YSZ composite electrode," Solid State Ionics, vol.
The energy spectra for a large number of NORM samples were measured, including: slate, cat litter, ice melt, roofing tiles, hay, coal, fertilizer, Australian zircon sand, diammonium phosphate (DAP), ISG Pye, CEMEX type FC, monocalcium phosphate (biofos), allanite, monazite, pyrochlore
Tantalum and niobium are contained in the minerals ferrocolumbite and pyrochlore