The crystal structure and chemical composition of pollucite
Abstract
The structure of pollucite from Rumford, Maine has been determined and refined. The space group is Ia3d with cell edge a = 13.69 Å. The structure was investigated using 213 independent reflection intensities measured on a single crystal diffractometer. Pollucite has the analcime framework with the cesium atoms occupying the large voids in the framework, as initially suggested by Náray-Szabó. The water molecules occupy the large voids of this same set which are not occupied by the cesium atoms. The sodium atoms are located in equipoint 24c, at ¼ ⅛ 0, in the positions between the water molecules. The water molecules and the sodium atoms occupy the same positions as they do in analcime, but they occur only in randomly distributed clusters of atoms whose outer members are restricted to water molecules. The final structure was refined by least squares to an R value of 0.050 for all reflections. The chemical composition of pollucite can be expressed by a general formula similar to: CsxNayAlx+ySi48−x−y · O96(16−x) H2O, in which 2y ⩾ 16 − x ⩾ y.
Articles in the same Issue
- Zur Absorption der Ewaldwellen; Messungen bei simultaner Reflexion an (111) und ([unk]11) des Germaniums
- Die Verteilung der Valenzelektronen im Mg2Si
- Redetermination of the crystal structure of α-d-glucosamine hydrohalides*
- Crystal structure of d-leucyl glycine hydrobromide*
- The crystal structure of orthoenstatite
- The crystal and molecular structure of l-ornithine hydrochloride
- Untersuchungen über Umweganregung und ihre Vermeidung am Beispiel des Na2BeF4*
- Analysis of density distribution of the outer electrons in hexamine*
- Bestimmung des Elastizitätstensors trikliner Kristalle: Beispiel CuSO4 · 5H2O
- The crystal structure of 2-aminoethyl seleninic acid · HCl, NH2CH2CH2SeOOH · HCl
- Strukturuntersuchung an Bariumazid Ba(N3)2
- Energetics of conducting halides
- The crystal structure of trechmannite, AgAsS2*
- Die Kristallstruktur von Baumhauerit*
- The crystal structure of rubidium hydrogen fumarate, RbC4H3O4
- Die Kristallstruktur von Imidazol, C3N2H4, bei Zimmertemperatur
- Verfeinerung der Kristallstruktur von Benitoit BaTi[Si3O9]
- The crystal structure of In5Bi3
- Über den Ersatz von Li1+ durch Cu1+ in oxidischen Spinellen*
- Cu1+-haltige Doppeloxide mit seltenen Erdmetallen1
- Transformations ordre-désordre de la cordiérite
- The crystal structure and chemical composition of pollucite
- Die optische Orientierung der Plagioklase
- World Directory of Crystallographers
Articles in the same Issue
- Zur Absorption der Ewaldwellen; Messungen bei simultaner Reflexion an (111) und ([unk]11) des Germaniums
- Die Verteilung der Valenzelektronen im Mg2Si
- Redetermination of the crystal structure of α-d-glucosamine hydrohalides*
- Crystal structure of d-leucyl glycine hydrobromide*
- The crystal structure of orthoenstatite
- The crystal and molecular structure of l-ornithine hydrochloride
- Untersuchungen über Umweganregung und ihre Vermeidung am Beispiel des Na2BeF4*
- Analysis of density distribution of the outer electrons in hexamine*
- Bestimmung des Elastizitätstensors trikliner Kristalle: Beispiel CuSO4 · 5H2O
- The crystal structure of 2-aminoethyl seleninic acid · HCl, NH2CH2CH2SeOOH · HCl
- Strukturuntersuchung an Bariumazid Ba(N3)2
- Energetics of conducting halides
- The crystal structure of trechmannite, AgAsS2*
- Die Kristallstruktur von Baumhauerit*
- The crystal structure of rubidium hydrogen fumarate, RbC4H3O4
- Die Kristallstruktur von Imidazol, C3N2H4, bei Zimmertemperatur
- Verfeinerung der Kristallstruktur von Benitoit BaTi[Si3O9]
- The crystal structure of In5Bi3
- Über den Ersatz von Li1+ durch Cu1+ in oxidischen Spinellen*
- Cu1+-haltige Doppeloxide mit seltenen Erdmetallen1
- Transformations ordre-désordre de la cordiérite
- The crystal structure and chemical composition of pollucite
- Die optische Orientierung der Plagioklase
- World Directory of Crystallographers
