Interference No. 101,981 at least 90% of the sample must be the Orthorhombic I phase. QR p. 537 ¶ 20. The sample must have the cation stoichiometry of 1:2:3 and must have the correct oxygen stoichiometry – about 7. (Qadri’s emphasis.) 21Page: Previous 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 NextLast modified: November 3, 2007