Effect of isotopic constitution of diamond on its elastic constants: [sup 13]C diamond, the hardest known material

Journal Article · Mon Jul 05 00:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.189· OSTI ID:6210530

Ramdas, A K; Rodriguez, S ^[1]; Grimsditch, M ^[2]; Anthony, T R; Banholzer, W F ^[3]

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1. Department of Physics, Purdue University, West Lafayette, Indiana 47907 (United States)
2. Argonne National laboratory, Argonne, Illinois 60439 (United States)
3. GE Corporate Research and Development, Schenectady, New York 12309 (United States)

Elastic moduli of [sup 13]C diamond, deduced from the Brillouin shifts experienced by inelastically scattered monochromatic radiation, are [similar to]0.5% higher than the corresponding values for natural diamond. This suggests [sup 13]C diamond is harder than natural diamond. A simple model incorporating the zero-point motion and the anharmonicity of the interatomic forces is proposed; it explains quantitatively the increase in the elastic moduli, the decrease in the lattice parameter, and a correction to the Raman frequency beyond its [ital M][sup [minus]1/2] dependence (where [ital M] is the average atomic mass) observed for [sup 13]C diamond with respect to their values for natural diamond.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6210530
• Journal Information: Physical Review Letters; (United States), Vol. 71:1; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON 13
ISOTOPE EFFECTS
DIAMONDS
ELASTICITY
BRILLOUIN EFFECT
HARDNESS
INTERATOMIC FORCES
LATTICE PARAMETERS
RAMAN EFFECT
CARBON
CARBON ISOTOPES
COHERENT SCATTERING
ELEMENTAL MINERALS
ELEMENTS
EVEN-ODD NUCLEI
ISOTOPES
LIGHT NUCLEI
MECHANICAL PROPERTIES
MINERALS
NONMETALS
NUCLEI
SCATTERING
STABLE ISOTOPES
TENSILE PROPERTIES
360603* - Materials- Properties
360606 - Other Materials- Physical Properties- (1992-)