Published May 2020
| Version v1
Journal article
Crystal Structure of Niobium-Rich Lomonosovite with Symmetry P1 from the Khibiny Massif (Kola Peninsula)
- 1. Shubnikov Institute of Crystallography, Federal Scientific Research Centre "Crystallography and Photonics," Russian Academy of Sciences (Russian Federation)
- 2. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences (Russian Federation)
- 3. Moscow State University (Russian Federation)
Description
A new niobium-rich lomonosovite variety with a high degree of ordering of Ti and Nb atoms has been investigated by X-ray diffraction analysis and electron probe microanalysis. Its simplified formula is Na10Ti2(Nb,Fe,Ti)2(Si2O7)2(PO4)2O4. The triclinic unit-cell parameters are a = 5.411(1) Å, b = 7.108(1) Å, c = 14.477(2) Å, α = 99.78(1)°, β = 96.59(1)°, γ = 90.26(1)°, V = 544.94(5) Å3, Z = 1, sp. gr. P1. The crystal structure has been refined to the final reliability factor R = 6.3% within the anisotropic approximation of atomic displacements using 3674 reflections with F > 3σ(F). The problem of niobium distribution in minerals with structures of lomonosovite and related types is discussed.
Additional details
Identifiers
Publishing Information
- Journal Title
- Crystallography Reports
- Journal Volume
- 65
- Journal Issue
- 3
- Journal Page Range
- p. 422-427
- ISSN
- 1063-7745
- CODEN
- CYSTE3
INIS
- Country of Publication
- Russian Federation
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 55060759
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANISOTROPY; APPROXIMATIONS; ATOMIC DISPLACEMENTS; BOND ANGLE; CRYSTAL STRUCTURE; INTERATOMIC DISTANCES; LATTICE PARAMETERS; MONOCLINIC LATTICES; NIOBIUM; PROBES; R FACTORS; REFLECTION; RELIABILITY; SPACE GROUPS; TITANIUM; X-RAY DIFFRACTION
- Descriptors DEC
- CALCULATION METHODS; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; DISTANCE; ELEMENTS; METALS; PHYSICAL RADIATION EFFECTS; RADIATION EFFECTS; REFRACTORY METALS; SCATTERING; SYMMETRY GROUPS; THREE-DIMENSIONAL LATTICES; TRANSITION ELEMENTS
Optional Information
- Copyright
- Copyright (c) 2020 © Pleiades Publishing, Inc. 2020