Thermal expansion of francisite, [Cu 3 BiO 2 ](SeO 3 ) 2 Cl, and its interpretation based on oxocentered copper-bismuth tetrahedra

Nazarchuk, Evgeny V.; Krivovichev, Sergey V.; Pankratova, O. Yu.; Филатов, С. К.

doi:10.1007/s002699900079

Cited by 19 publications

(11 citation statements)

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“…The variation of the halogens in these phases results in a regular increase of unit cell parameters and elongation of the corresponding bonds. Hence, the magnetic properties of the bismuth oxohalides are very similar, with Néel temperatures of 24.2 K and 23.8 K in the oxychloride and oxybromide, respectively [13].…”

Section: Introductionmentioning

confidence: 82%

“…The chloride ions and the selenium lone pair electrons occupy tunnels parallel to [001], as shown in Figure 1. Studies of the physical properties of francisite are limited to measurements of anisotropic thermal expansion, interpreted in terms of oxocentered copper-bismuth tetrahedra [13] and investigations of magnetism and optical birefringence in its synthetic analogues Cu 3 Bi(SeO 3 ) 2 O 2 X (X = Cl, Br, I) [14]. At low temperatures, long-range magnetic order was established in both Cl-based and Br-based compounds.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic properties, electron spin resonance, and underlying spin model inCu3Y(SeO3)2O2Cl
Zakharov
¹
,
Zvereva
²
,
Berdonosov
³

et al. 2014
Phys. Rev. B
45
3
11
0
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We report a detailed study of the magnetic properties of the buckled kagome compound Cu 3 Y(SeO 3) 2 O 2 Cl using heat capacity, magnetization, powder neutron diffraction, electron spin resonance and first-principles calculations. The crystal structure is confirmed to be isotypic with the mineral francisite, with orthorhombic space group symmetry Pmmn throughout the temperature range 5-300 K. Magnetization, heat capacity and neutron diffraction confirm long range magnetic order below T N = 35 K. The electron spin resonance spectra reveal the presence of two modes corresponding to two different crystallographic Cu positions. The principal g-values of the g-tensor of Cu(1) sites were found to be g 1 = 2.18(4), g 2 = 2.10(6) and g 3 = 2.05(9), while the effective g-factor of Cu(2) sites is almost isotropic and is on average g = 2.09(5). At low temperatures, Cu 3 Y(SeO 3) 2 O 2 Cl undergoes a metamagnetic transition, with a critical field B C = 2.6 T at 2 K, due to the suppression of the inter-plane exchange interactions and saturates in modest magnetic field, B S  8 T. The first-principles calculations allow an estimation of both intra-plane and inter-plane exchange interactions. The weakness of the inter-plane exchange interaction results in low values of the critical fields for the metamagnetic transition, while the competition between intra-plane exchange interactions of different signs results in a similarly low value of the saturation field.

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Section: Introductionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Thermodynamic properties, electron spin resonance, and underlying spin model inCu3Y(SeO3)2O2Cl
Zakharov
¹
,
Zvereva
²
,
Berdonosov
³

et al. 2014
Phys. Rev. B
45
3
11
0
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“…In contrast to the Tolbachik minerals, francisite forms from low-temperature hydrothermal fluids and can be synthesized using hydrothermal methods (Pring et al 1990). Recently, Nazarchuk et al (2000) and Millet et al (2001) synthesized francisite using chemical transport reactions and solid-state reactions, respectively. These authors have shown therefore that francisite can crystallize from a gaseous phase, in the same manner as the selenites from the Tolbachik fumaroles do.…”

Section: Relationships To Other Species and Field Of Stabilitymentioning

confidence: 99%

Filatovite, K(Al, Zn)2(As, Si)2O8, a new mineral species from the Tolbachik volcano, Kamchatka peninsula, Russia

Vergasova¹,

Krivovichev²,

Britvin³

et al. 2004

ejm

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Burnsite, ideally KCdCu 7 O 2 (SeO 3 ) 2 Cl 9 , occurs in a fumarole in the North Breach of the great fissure Tolbachik volcano eruption (1975Tolbachik volcano eruption ( -1976, Kamchatka Peninsula, Russia. It occurs as dark red, anhedral, equidimensional grains. Associated minerals are cotunnite, sophiite, chloromenite, georgbokiite, ilinskite and an undefined Cu-Pb selenite. Burnsite is very rare and has only been found as several dozen grains that do not exceed 0.1 mm in maximum dimension. It is very similar megascopically to georgbokiite and the undefined Cu-Pb selenite, but differs from them by its red color. Burnsite has a strongly vitreous (metalloid) luster and a red streak. The mineral is brittle, opaque to translucent, with an uneven fracture. Cleavage is good on the (001) plane. Hardness VHN = 12 kg/mm 2 . The calculated density is 3.85 g/cm 3 . It is nonfluorescent. It is uniaxial negative, E 1.912(5), O 1.920(5), with weak bireflectance and no pleochroism. Burnsite is hexagonal, space group P6 3 /mmc, a 8.7805 (8), b 15.521(2) Å, V 1036.3(2) Å 3 , Z = 2. The strongest eight lines of the X-ray powder-diffraction pattern [d in Å (I)(hkl)] are: 7.and 2.190(50)(220). Electronmicroprobe analyses yield K 2 O 4.30, CuO 46.74,CdO 10.45, SeO 2 19.91, Cl 25.46, less O=Cl 2 -5.75, total 101.11 wt. %. The empirical formula, derived from the crystal-structure analysis and electron-microprobe analyses, is K 1.08 Cd 0.97 Cu 6.98 O 2.05 (Se 1.07 O 3.21 ) 2 Cl 8.53 , on the basis of O + Cl = 17. The mineral name honors Professor Peter C. Burns, University of Notre Dame, Indiana, in recognition of his important contributions to structural mineralogy.

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“…Кристаллическая структура минерала францисита была определена в 1990 г. [33] и подтверждена позднее в ряде работ [37][38][39]. Он кристаллизуется в ромбической сингонии, пространственная группа Pmmn.…”

Section: Introductionunclassified

Химическое сжатие, структурная нестабильность и ИК-активные фононы в ряду редкоземельных аналогов францисита Cu-=SUB=-3-=/SUB=-RE(SeO-=SUB=-3-=/SUB=-)-=SUB=-2-=/SUB=-O-=SUB=-2-=/SUB=-Cl

Новикова¹,

Яковлев²,

Кузнецова³

et al. 2022

Оптика И Спектроскопия

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ATR and transmission spectra of a series of rare-earth francisite-like phases Cu3RE(SeO3)2O2Cl (RE is a rare earth element, RE = Nd, Sm, Eu, Gd, Dy, Ho, Tm, Yb) were studied. The frequencies of the IR-active phonons of the crystals under study were determined. In the dependences of phonon frequencies on the ionic radius in a series of isostructural compounds, two tendencies are observed: a hardening of frequencies due to an increase in chemical pressure and a softening of the vibration frequencies, in which rare-earth ions are involved, due to an increase in the mass of a specific rare-earth ion. In the Cu3Dy(SeO3)2O2Cl crystal, an anomalous softening of low-frequency phonons at low temperatures was observed, which was apparently associated with the structural instability of the compound.

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Thermal expansion of francisite, [Cu 3 BiO 2 ](SeO 3 ) 2 Cl, and its interpretation based on oxocentered copper-bismuth tetrahedra

Cited by 19 publications

References 0 publications

Thermodynamic properties, electron spin resonance, and underlying spin model inCu3Y(SeO3)2O2Cl
Zakharov
¹
,
Zvereva
²
,
Berdonosov
³

et al. 2014
Phys. Rev. B
45
3
11
0
View full text Add to dashboard Cite

Thermodynamic properties, electron spin resonance, and underlying spin model inCu3Y(SeO3)2O2Cl
Zakharov
¹
,
Zvereva
²
,
Berdonosov
³

et al. 2014
Phys. Rev. B
45
3
11
0
View full text Add to dashboard Cite

Filatovite, K(Al, Zn)2(As, Si)2O8, a new mineral species from the Tolbachik volcano, Kamchatka peninsula, Russia

Химическое сжатие, структурная нестабильность и ИК-активные фононы в ряду редкоземельных аналогов францисита Cu-=SUB=-3-=/SUB=-RE(SeO-=SUB=-3-=/SUB=-)-=SUB=-2-=/SUB=-O-=SUB=-2-=/SUB=-Cl

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Thermal expansion of francisite, [Cu 3 BiO 2 ](SeO 3 ) 2 Cl, and its interpretation based on oxocentered copper-bismuth tetrahedra

Cited by 19 publications

References 0 publications

Thermodynamic properties, electron spin resonance, and underlying spin model inCu3Y(SeO3)2O2ClZakharov1, Zvereva2, Berdonosov3 et al. 2014Phys. Rev. B453110View full textAdd to dashboardCite

Thermodynamic properties, electron spin resonance, and underlying spin model inCu3Y(SeO3)2O2ClZakharov1, Zvereva2, Berdonosov3 et al. 2014Phys. Rev. B453110View full textAdd to dashboardCite

Filatovite, K(Al, Zn)2(As, Si)2O8, a new mineral species from the Tolbachik volcano, Kamchatka peninsula, Russia

Химическое сжатие, структурная нестабильность и ИК-активные фононы в ряду редкоземельных аналогов францисита Cu-=SUB=-3-=/SUB=-RE(SeO-=SUB=-3-=/SUB=-)-=SUB=-2-=/SUB=-O-=SUB=-2-=/SUB=-Cl

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Thermodynamic properties, electron spin resonance, and underlying spin model inCu3Y(SeO3)2O2Cl
Zakharov
¹
,
Zvereva
²
,
Berdonosov
³

et al. 2014
Phys. Rev. B
45
3
11
0
View full text Add to dashboard Cite

Thermodynamic properties, electron spin resonance, and underlying spin model inCu3Y(SeO3)2O2Cl
Zakharov
¹
,
Zvereva
²
,
Berdonosov
³

et al. 2014
Phys. Rev. B
45
3
11
0
View full text Add to dashboard Cite