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Browsing by Author "Pen'kov I."

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A novel data on Ag5SbS4 and CuPbSbS3 probed by antimony NQR spectroscopy

Orlova A.; Gainov R.; Dooglav A.; Pen'kov I. (2013)

Investigations of Sb-based chalcogenides, stephanite Ag5SbS 4 and bournonite CuPbSbS 3, have been performed by 121,123Sb nuclear quadrupole resonance (NQR). In stephanite a phase transition at 140 K and internal diffusion ...
Application of 57Fe Mössbauer spectroscopy as a tool for mining exploration of bornite (Cu5FeS4) copper ore

Gainov R.; Vagizov F.; Golovanevskiy V.; Ksenofontov V.; Klingelhöfer G.; Klekovkina V.; Shumilova T.; Pen'kov I. (2014)

Nuclear resonance methods, including Mössbauer spectroscopy,are considered as unique techniques suitable for remote on-line mineralogical analysis. The employment of these methods provides potentially significant commercial ...
Application of nuclear quadrupole resonance in study of minerals

Pen'kov I.; Sofin I. (1967)

The NQR method has been used to study some structural and chemical properties of minerals that are difficult or impossible to determine by conventional methods. For example, an X-ray determination commonly integrates the ...
Copper valence, structural separation and lattice dynamics in tennantite (fahlore): NMR, NQR and SQUID studies

Gainov R.; Dooglav A.; Pen'kov I.; Mukhamedshin I.; Savinkov A.; Mozgova N. (2008)

Electronic and magnetic properties of tennantite subfamily of tetrahedrite-group minerals have been studied by copper nuclear quadrupole resonance (NQR), nuclear magnetic resonance (NMR) and SQUID magnetometry methods. The ...
Electronic structure and indirect spin-spin interactions in bournonite (CuPbSbS3) according to antimony nuclear quadrupole resonance

Orlova A.; Gainov R.; Dooglav A.; Pen'kov I. (2013)

A complex sulfide CuPbSbS3 (bournonite) has been studied by the nuclear quadrupole resonance on 121,123Sb. The temperature dependences of the spectroscopic and relaxation parameters in the temperature range of 10-295 K ...
Evidence for low-temperature internal dynamics in Cu12As4S13 according to copper NQR and nuclear relaxation

Gainov R.; Dooglav A.; Pen'kov I. (2006)

63,65Cu nuclear quadrupole resonance (NQR) was applied to study the natural mineral Cu12As4S13 (tennantite) in the temperature range 4.2-210 K. The obtained results point to the presence of field fluctuations caused by ...
Investigation of copper minerals by NQR: Crystallochemistry, electronic structure, lattice dynamics

Abdullin R.; Kal'chev V.; Pen'kov I. (1987)

A series of copper minerals has been investigated by NQR (Nuclear Quadrupole Resonance), the most typical cases of Cu(I) environment in oxides, sulphides and sulphosalts being taken into account. The linear complexes Cu ...
NQR/NMR and Mössbauer spectroscopy of sulfides: Potential and versatility

Gainov R.; Dooglav A.; Vagizov F.; Pen'kov I.; Golovanevskiy V.; Orlova A.; Evlampiev I.; Klekovkina V.; Klingelhöfer G.; Ksenofontov V.; Mozgova N. (2013)

Nuclear quadrupole resonance (NQR), nuclear magnetic resonance (NMR) and nuclear gamma-resonance (NGR or Mössbauer Effect) methods are generally described as highly sensitive tools in studies of local electronic structure ...
Nuclear gamma resonance of Sn119 and Fe57 in franckeite and cylindrite.

Manapov R.; Pen'kov I. (1977)

The NGR data indicate that the coordination symmetry and valence states of tin ions are the same in franckeite and cylindrite, but that cylindrite contains more Sn2+. Also Fe is essential to both minerals. Apparently one ...
Structure and transport properties of stephanite (Ag 5SbS 4) according to antimony nuclear quadrupole resonance

Orlova A.; Gainov R.; Dooglav A.; Pen'kov I.; Korolev E. (2012)

Silver sulfo-antimonide Ag 5SbS 4 (stephanite) has been studied by nuclear quadrupole resonance (NQR) spectroscopy on antimony nuclei. The temperature dependences of the spectroscopic and relaxation parameters have been ...

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Browsing by Author "Pen'kov I."

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