The redetermination and refinement of the crystal structure of rhodonite, (Mn,Ca)SiO3
Abstract
Rhodonite has space group P[unk] and unit-cell parameters a = 7.682 Å, b = 11.818 Å, c = 6.707 Å, α = 92.355°, β = 93.948°, and γ = 105.665°. A trial structure determined through application of the minimum function to the Patterson function, P(xyz), was improved and refined with Fourier syntheses and least squares.
Planes containing octahedrally coordinated cations alternate with planes of tetrahedrally coordinated Si ions between planes of approximately close-packed oxygen ions. Tetrahedra are linked to form chains with a repeat unit of five tetrahedra. Octahedrally coordinated cations occupy five general equipoints, with Ca preferentially distributed in one position, and Mg and Fe in another. Octahedra share edges to form bands extending parallel to the silica chains and separated by a rift of unoccupied octahedrally coordinated sites.
Artikel in diesem Heft
- Kristallstrukturbestimmung von Imidazol (C3N2H4) mit Faltmolekülen*
- Die Kristallstruktur einiger Alkohol-Halbhydrate
- Applications of Fourier-transform theory to electron-density extraction of Patterson functions
- Single crystals grown from small droplets
- The crystal structure of dachiardite
- Structure, growth and morphology of crystals*
- A back-reflection x-ray camera for thermal-expansion studies and the thermal expansion of NaCl from −180°C to 200°C
- High-pressure scheelite-structure polymorphs of rare-earth vanadates and arsenates
- The redetermination and refinement of the crystal structure of rhodonite, (Mn,Ca)SiO3
- The crystal structure of hodgkinsonite Zn2Mn [(OH)2|SiO4]
- Atomic radii in metals
- Derivation of the two-sided, two-colored, band groups with their associated point groups and a numerical correction
- Some crystallographic properties of CaSeO4 and its hydrates
- Space group of biguanide acid sulphate
- The unit-cell of freudenbergite
Artikel in diesem Heft
- Kristallstrukturbestimmung von Imidazol (C3N2H4) mit Faltmolekülen*
- Die Kristallstruktur einiger Alkohol-Halbhydrate
- Applications of Fourier-transform theory to electron-density extraction of Patterson functions
- Single crystals grown from small droplets
- The crystal structure of dachiardite
- Structure, growth and morphology of crystals*
- A back-reflection x-ray camera for thermal-expansion studies and the thermal expansion of NaCl from −180°C to 200°C
- High-pressure scheelite-structure polymorphs of rare-earth vanadates and arsenates
- The redetermination and refinement of the crystal structure of rhodonite, (Mn,Ca)SiO3
- The crystal structure of hodgkinsonite Zn2Mn [(OH)2|SiO4]
- Atomic radii in metals
- Derivation of the two-sided, two-colored, band groups with their associated point groups and a numerical correction
- Some crystallographic properties of CaSeO4 and its hydrates
- Space group of biguanide acid sulphate
- The unit-cell of freudenbergite
