Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Crystal structure and topological features of manganonaujakasite, a mineral with microporous heteropolyhedral framework related to AlPO-25 (ATV)
Ist Teil von
Microporous and mesoporous materials, 2019-05, Vol.279, p.128-132
Ort / Verlag
Elsevier Inc
Erscheinungsjahr
2019
Link zum Volltext
Quelle
Access via ScienceDirect (Elsevier)
Beschreibungen/Notizen
The crystal structure of manganonaujakasite was studied by single crystal X-ray analysis and infrared spectroscopy using a holotype sample with the empirical chemical formula (Na5.96Ca0.01) (Mn0.53Fe0.49)Al3.95Si8.03O26.00. The monoclinic unit cell parameters are: a = 15.029(1) Å, b = 7.999(1) Å, c = 10.467(1) Å, β = 113.551(1)°; V = 1153.47(15) Å3, space group C2/m, Z = 2. The microporous crystal structure of manganonaujakasite is similar to that of naujakasite and is based on tetrahedral [Al4Si8O26]-double layers which are linked via isolated (Mn,Fe)O6-octahedra to form a heteropolyhedral framework containing two systems of parallel wide channels. The naujakasite-type framework topologically relates to the ATV-type of AlPO4. Both are built from the same t-kah [63] and t-lov [42.62] tiles and are characterized by similar one-dimensional composite building units represented by the narsarsukite-type nsc-chain. The comparative data for the frameworks of naujakasite- and ATV-types are given.
[Display omitted]
•The microporous crystal structure of manganonaujakasite was studied.•The naujakasite-type framework is topologically related to the ATV-type.•Topological analysis shows that both naujakasite and ATV-type framework are built by the same t-kah and t-lov tiles and characterized by similar one-dimensional CBU representing by the nsc-chain.