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Crystal structures of some niobium and tantalum oxides. VIII. The 5Rb2O:14.6Ta2O5 phase—A tunnel structure

✍ Scribed by G.D. Fallon; B.M. Gatehouse


Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
412 KB
Volume
34
Category
Article
ISSN
0022-4596

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The Phase Diagram CaO–Al2O3–Ta2O5and the
✍ M. Sales; G. Eguia; P. Quintana; L.M. Torres-Martinez; A.R. West 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 259 KB

The subsolidus phase diagram CaO-Al 2 O 3 -Ta 2 O 5 has been determined at 1300-1350°C. Two ternary phases are present, Ca 2 AlTaO 6 and the new phase, CaAlTaO 5 . From Rietveld refinement of powder X-ray diffraction data, CaAlTaO 5 has the sphene structure, monoclinic 6.6760(3), 8.9546(3), 7.3494(3