Unexpected phase transformation from VO2(R) to VO2(A) during hydrothermal treatment in the V2O5–H2C2O4–H2O system
✍ Scribed by Shidong Ji; Feng Zhang; Ping Jin
- Publisher
- Springer Netherlands
- Year
- 2011
- Tongue
- English
- Weight
- 410 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0922-6168
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📜 SIMILAR VOLUMES
2.5 , monoclinic C2/m, a ؍ 18.425(4) A ˚, c ؍ 8.954(2) A ˚,  ؍ 93.69(2) 0 , V ؍ 1221.1(4) A ˚3, Z ؍ 4, D calc ؍ 2.423 g cm ؊3 ; 2 ؒ H 2 O, H 4 F 2 K 2 O 13 P 2 V 3 , triclinic P1, a ؍ 7.298(1) A ˚, b ؍ 8.929(2) A ˚, c ؍ 10.090(2) A ˚, ␣ ؍ 104.50(2) 0 ,  ؍ 100.39(2) 0 , ␦ ؍
4؉ , and As 5؉ , but none of them crystallize in space group Pn2n. In the K/V/P/N(C 2 H 5 ) 3 / H 2 O system, three different K phases were found: K 0.5 VOPO 4 • 1.5H 2 O, KVOPO 4 , and K-FVP-1 (Frankfurt vanadium phosphate, one, or for short, FVP-1). The microporous K-FVP-1 compound was synthesize
DEDICATED TO PROFESSOR J. M. HONIG (V IV O) 2 (H 2 O){O 3 P+(CH 2 ) 3 +PO 3 } ' 2H 2 O was hydrothermally synthesized from a mixture of VOSO 4 ' 5H 2 O : H 2 PO 3 + (CH 2 ) 3 +PO 3 H 2 : H 2 O in a molar ratio 1 : 0.5 : 250 and heated for 72 hours to 1703C. Its structure was determined from powder X