Verfeinerung der Struktur des Zinkhydroxidchlorids II, Zn5(OH)8Cl2 · 1H2O
Abstract
Using a three-dimensional set of 267 independent structure factors estimated from Weissenberg films, the structure of Zn5(OH)8Cl2 · 1H2O has been refined. Space group R[unk]m, a = 6.34, c = 23.64 Å, Z = 3. A three-dimensional Fouriersynthesis showed that the water molecules statistically occupy one of six possible sites about 0.4 Å off the ideal position in 0 0 ½. The structure consists of brucite-like main layers [Zn3(OH)8]2− with ¼ unoccupied octahedral sites [Zn–O = 2.08 and 2.17 Å, O–O = 2.82 (shared edge), 3.04, 3.10, and 3.18 Å], and of interlayers [2Cl · 1H2O]2− (Cl–Cl = 3.66, Cl–H2O between 3.28 and 4.05 Å). The remaining zinc atoms are situated in tetrahedral sites between these two layers, above and below the empty octahedral sites of the main layer (Zn–O = 1.94, Zn–Cl = 2.31 Å, O–O = 3.24, O–Cl = 3.38 Å). The R value dropped to 14.0%. With exception of the bonds to H2O (±0.12 Å), the accuracy of all bond lengths is about ±0.02 Å.
Articles in the same Issue
- Inclined dislocations in apophyllite crystals
- Oriented transformation of lithiophorite
- Refraktionsmodifizierte Braggsche Beugung bei asymmetrischer Durchstrahl-Reflexion
- Notes on the size of transition-metal atoms
- Crystal structure of cadmium mercuric thiocyanate, CdHg(SCN)4
- Product of the normalized intensities in a test for isomorphism using higher moments of intensities*
- The unit cell of gaylussite
- The crystal structures and infra-red spectra of barium and strontium nitrates
- A comparison of some weighted Fourier syntheses with the summation method for vector convergence
- A modification to Patterson syntheses
- Verfeinerung der Struktur des Zinkhydroxidchlorids II, Zn5(OH)8Cl2 · 1H2O
- The Z expansion of the atomic scattering factor for the helium sequence*
- The crystal structure of vauquelinite and the relationships to fornacite
- The study of polytypism in silicon carbide by x-ray diffraction topography
- The neutron-scattering amplitude of potassium
- Errata: Refinement of the structure of scandium sesquioxide
Articles in the same Issue
- Inclined dislocations in apophyllite crystals
- Oriented transformation of lithiophorite
- Refraktionsmodifizierte Braggsche Beugung bei asymmetrischer Durchstrahl-Reflexion
- Notes on the size of transition-metal atoms
- Crystal structure of cadmium mercuric thiocyanate, CdHg(SCN)4
- Product of the normalized intensities in a test for isomorphism using higher moments of intensities*
- The unit cell of gaylussite
- The crystal structures and infra-red spectra of barium and strontium nitrates
- A comparison of some weighted Fourier syntheses with the summation method for vector convergence
- A modification to Patterson syntheses
- Verfeinerung der Struktur des Zinkhydroxidchlorids II, Zn5(OH)8Cl2 · 1H2O
- The Z expansion of the atomic scattering factor for the helium sequence*
- The crystal structure of vauquelinite and the relationships to fornacite
- The study of polytypism in silicon carbide by x-ray diffraction topography
- The neutron-scattering amplitude of potassium
- Errata: Refinement of the structure of scandium sesquioxide
