Contributions on crystal structures and thermal behaviour of anhydrous phosphates.: XXIX -: Preparation and structure determination of SrMn2(PO4)2 and redetermination of β′-Mn3(PO4)2 - Forschungsportal der Justus-Liebig-Universität Gießen:

Journalartikel

Contributions on crystal structures and thermal behaviour of anhydrous phosphates.: XXIX -: Preparation and structure determination of SrMn2(PO4)2 and redetermination of β′-Mn3(PO4)2

Autorenliste: El-Bali, B; Boukhari, A; Glaum, R; Gerk, M; Maaß, K

Jahr der Veröffentlichung: 2000

Seiten: 2557-2562

Zeitschrift: Journal of Inorganic and General Chemistry

Bandnummer: 626

Heftnummer: 12

ISSN: 0044-2313

DOI Link: https://doi.org/10.1002/1521-3749(200012)626:12<2557::AID-ZAAC2557>3.0.CO;2-E

Verlag: Wiley

Abstract:
Pale rose single crystals of SrMn2(PO4)(2) were obtained from a mixture of SrCl2.6 H2O, Mn(CH3COO)(2), and (NH4)(2)HPO4 after thermal decomposition and finally melting at 1100 degreesC. The new crystal structure of strontium manganese orthophosphate [P-1, Z=4, a=8.860(6) Angstrom, b = 9.054(6) Angstrom, c = 10.260(7) Angstrom, alpha = 124.27(5)degrees, beta = 90.23(5)degrees, gamma =90.26(6)degrees, 4220 independent reflections, R1 = 0.034, wR2 = 0.046] might be described as hexagonal close-packing of phosphate groups. The octahedral, tetrahedral and trigonal-bipyramidal voids within this [PO4] packing provide different positions for 8- and 10-fold [SrOx] and distorted octahedral [MnO6] coordination according to a formulation (Mn1Mn1Mn2Sr2oct)-Mn-tbpy-Mn-tet-Sr-oct (PO4)(4). Single crystals of beta'- Mn-3(PO4)(2) (pale rose) were grown by chemical vapour transport (850 degreesC --> 800 degreesC, P/I mixtures as transport agent). The unit cell of beta'-Mn-3(PO4)(2) [P2(1)/c, Z = 12, a = 8.948(2) Angstrom, b = 10.050(2) Angstrom, c = 24.084(2) Angstrom, beta = 120.50 degrees, 2953 independent reflections, R1 = 0.0314, wR2 = 0.095] contains 9 independent Mn2+. The reinvestigation of the crystal structure led to distinctly better agreement factors and significantly reduced standard deviations for the interatomic distances.

Autoren/Herausgeber

- Dr. Kai Maaß

Zitierstile

Harvard-Zitierstil: El-Bali, B., Boukhari, A., Glaum, R., Gerk, M. and Maaß, K. (2000) Contributions on crystal structures and thermal behaviour of anhydrous phosphates.: XXIX -: Preparation and structure determination of SrMn2(PO4)2 and redetermination of β′-Mn3(PO4)2, Journal of Inorganic and General Chemistry, 626(12), pp. 2557-2562. https://doi.org/10.1002/1521-3749(200012)626:12<2557::AID-ZAAC2557>3.0.CO;2-E

APA-Zitierstil: El-Bali, B., Boukhari, A., Glaum, R., Gerk, M., & Maaß, K. (2000). Contributions on crystal structures and thermal behaviour of anhydrous phosphates.: XXIX -: Preparation and structure determination of SrMn2(PO4)2 and redetermination of β′-Mn3(PO4)2. Journal of Inorganic and General Chemistry. 626(12), 2557-2562. https://doi.org/10.1002/1521-3749(200012)626:12<2557::AID-ZAAC2557>3.0.CO;2-E

Autoren/Herausgeber

Zitierstile

Schlagwörter