𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Hydrothermal Synthesis, Structure, and Magnetic Characterization of a New Ferrimagnetic Open Framework Phosphate: MIL-21 or [FeIII5−xVIIIx(H2PO4)4(HPO4)4F4(H2O)2, 4(H2+yN–(CH2)2–NH2+y)] with a Partial Cationic Disorder

✍ Scribed by Myriam Riou-Cavellec; Jean-Marc Grenèche; Gérard Férey

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
453 KB
Volume
148
Category
Article
ISSN
0022-4596

No coin nor oath required. For personal study only.

✦ Synopsis

MIL-21 or [Fe III

5؊x V III x (H 2 PO 4 ) 4 (HPO 4 ) 4 F 4 (H 2 O) 2 , 4(H 2؉y N+ (CH 2 ) 2 +NH 2؉y )] was prepared hydrothermally (453 K, autogenous pressure, 3 days) in the presence of ethylenediamine. Its structure was determined by single-crystal X-ray di4raction. MIL-21 is tetragonal (space group P-42 1 c, No. 114, with cell parameters a ‫؍‬ 17.2023(2) A s , c ‫؍‬ 13.3086(2) A s , V ‫؍‬ 3938.27(9) A s 3 , Z ‫؍‬ 4. Its three-dimensional network can be described from the connection via phosphate tetrahedra of in5nite corner-sharing cis+trans octahedral chains of metallic atoms in a random distribution and isolated FeO 4 (H 2 O) 2 octahedra. The (Fe 3؉ , V 3؉ ) in5nite chains belong to the KTP type. MoK ssbauer and structure re5nements demonstrate this segregation. This structure exhibits small tunnels and cages in which the ethylenediamine molecules are located. Moreover, MIL-21 shows a ferrimagnetic behavior below 13 K.

📜 SIMILAR VOLUMES

A Nickel Molybdenum Phosphate with Tunne
A Nickel Molybdenum Phosphate with Tunnel: Hydrothermal Synthesis and Structure of (NH3CH2CH2NH3)4 · (NH3CH2CH2NH2) · Na · [Ni2Mo12O30(PO4)(HPO4)4(H2PO4)3] · 6H2O
✍ Lin Xu; Yaqiu Sun; Enbo Wang; Enhong Shen; Zhongri Liu; Changwen Hu; Yan Xing; Y 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 158 KB

A nickel molybdenum phosphate, (NH 3 CH 2 CH 2 NH 3 ) 4 ' (NH 3 CH 2 CH 2 NH 2 ) ' Na ' [Ni 2 Mo 12 O 30 (PO 4 ) (HPO 4 ) 4 (H 2 PO 4 ) 3 ] ' 6H 2 O, involving molybdenum present in V oxidation, has been hydrothermally synthesized and structurally characterized by single crystal X-ray di4raction. De

Synthesis of Open-Framework Iron Phospha
Synthesis of Open-Framework Iron Phosphates, [C6N2H14][FeIII2F2(HPO4)2(H2PO4)2]·2H2O and [C6N2H14]2[FeIII3(OH)F3(PO4)(HPO4)2]2·H2O, with One- and Three-Dimensional Structures
✍ S. Mahesh; Mark A. Green; Srinivasan Natarajan 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 485 KB

The hydrothermal syntheses and structures of two new open-framework iron phosphates, I, [C 6 N 2 H 14 ][Fe III 2 F 2 (HPO 4 ) 2 (H 2 PO 4 ) 2 ].2H 2 O, II, and [C 6 N 2 H 14 ] 2 [Fe III 3 (OH)F 3 (PO 4 ) (HPO 4 ) 2 ] 2 . H 2 O, are presented. The structures of both I and II consist of FeO 4 F 2 octa

Synthesis and Characterization of A New
Synthesis and Characterization of A New Open-Framework Cobalt Phosphate: Cs2Co3(HPO4)(PO4)2·H2O
✍ Ray-Kuang Chiang; Chi-Chun Huang; Chun-Rong Lin; Ching-Shuei Wur 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 228 KB

A new cobalt phosphate Cs 2 Co 3 (HPO 4 )(PO 4 ) 2 ' H 2 O 1, has been synthesized by hydrothermal reactions and characterized by single-crystal X-ray di4raction, thermogravimetric analysis, and magnetic techniques. It crystallizes in the monoclinic space group P2 1 with a ‫؍‬ 10.4711 (6) A > , b ‫؍