High-pressure study of the behavior of mineral barite by x-ray diffraction

Santamarı́a-Pérez, D.; Gracia, Lourdes; Garbarino, Gastón; Beltrán, Antonio; Chuliá-Jordán, Raquel; Gomis, O.; Errandonea, Daniel; Ferrer-Roca, Ch.; Martínez‐García, D.; Segura, A.

doi:10.1103/physrevb.84.054102

Cited by 75 publications

(78 citation statements)

References 29 publications

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“…The orthorhombic structure is a distortion of barite and its appearance as post-monazite phase in CeVO 4 is consistent with the fact that bariterelated structures have been found as HP phases in different monazites [13]. Barite and post-barite structures have been reported for high-pressure phases of CaSO 4 [32], BaSO 4 [31]. In case of anhydrite the barite-related structure has been reported as orthorhombic (Pbnm) phase through a monazite-type phase at high-pressure and high-temperature conditions, while a distorted-barite related phase (P2 1 2 1 2 1 ) is formed at high pressure itself in BaSO 4 [31].…”

Section: Resultssupporting

confidence: 61%

“…After considering several candidate structures, we found that the patterns measured beyond 14.7 GPa can be assigned to an orthorhombic structure with spacegroup symmetry P2 1 2 1 2 1 . In particular, a LeBail analysis allows indexing the pattern measured at 14.7 GPa with a CaSeO 4 -type structure (a = 6.88 Å , b = 5.88 Å, and c = 6.76 Å space group: P2 1 2 1 2 1 , Z = 4) similar to the high-pressure structure recently found in BaSO 4 [31]. The orthorhombic structure is a distortion of barite and its appearance as post-monazite phase in CeVO 4 is consistent with the fact that bariterelated structures have been found as HP phases in different monazites [13].…”

Section: Resultsmentioning

confidence: 90%

“…Barite and post-barite structures have been reported for high-pressure phases of CaSO 4 [32], BaSO 4 [31]. In case of anhydrite the barite-related structure has been reported as orthorhombic (Pbnm) phase through a monazite-type phase at high-pressure and high-temperature conditions, while a distorted-barite related phase (P2 1 2 1 2 1 ) is formed at high pressure itself in BaSO 4 [31]. A related structure is also found as a post-barite phase in AgClO 4 [33].…”

Section: Resultsmentioning

confidence: 99%

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In situhigh-pressure synchrotron x-ray diffraction study of CeVO4and TbVO4up to 50 GPa

et al. 2011

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Room temperature angle-dispersive x-ray diffraction measurements on zircon-type TbVO 4 and CeVO 4 were performed in a diamond-anvil cell up to 50 GPa using neon as pressure-transmitting medium. In TbVO 4 we found at 6.4 GPa evidence of a non-reversible pressure-induced structural phase transition from zircon to a scheelite-type structure. A second transition to an M-fergusonite-type structure was found at 33.9 GPa, which is reversible. Zircon-type CeVO 4 exhibits two pressureinduced transitions. First an irreversible transition to a monazite-type structure at 5.6GPa and second at 14.7 GPa a reversible transition to an orthorhombic structure. No additional phase transitions or evidences of chemical decomposition are found in the experiments. The equations of state and axial compressibility for the different phases are also determined. Finally, the sequence of structural transitions and the compressibilities are discussed in comparison with other orhtovanadates and the influence of non-hydrostaticity commented.

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Section: Resultssupporting

confidence: 61%

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

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In situhigh-pressure synchrotron x-ray diffraction study of CeVO4and TbVO4up to 50 GPa

et al. 2011

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“…On the other hand, compounds adopting this type of structure have been of renewed interest regarding their high-pressure (HP) behaviour 6,[8][9][10][11] . 12 ] dodecahedra) 11 .…”

Section: Introductionmentioning

confidence: 99%

High-pressure transition to the post-barite phase in BaCrO4hashemite

et al. 2012

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A recent high-pressure study on barium chromate BaCrO 4 reported a phase transition but the structure of the high-pressure phase structure could not be identified.This high-pressure phase was suggested to have a monoclinic structure different from other high-pressure forms of ABO 4 -type compounds. In this work, we have carried out x-ray diffraction measurements up to 46 GPa using He as quasi-hydrostatic pressure medium and Density-Functional Theory calculations. Our studies allow us identifying the high-pressure phase as the P2 1 2 1 2 1 post-barite-type phase, recently reported for

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“…In addition, much study has gone into MgSO 4 , BaSO 4 , various lithium sulfates, and sulfate salts (Lemos et al 1991;Sakuntala andArora 1999, 2000;Chen et al 2009Chen et al , 2010Brand et al 2010;Machon et al 2010;Crichton et al 2011;Jahn and Schmidt 2010;Zhang and Sekine 2007;Santamaría-Pérez et al 2011;Antao 2012). Hydrated sulfates like gypsum undergo several structural changes below 10 GPa, while others like BaSO 4 exhibit few signs of transformation up to 20 GPa.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and X-ray diffraction investigation of the behavior of hanksite and tychite at high pressures, and a model for the compressibility of sulfate minerals

Palaich

Manning

Schauble

et al. 2013

American Mineralogist

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The rare evaporite minerals hanksite, Na 22 K(SO 4 ) 9 (CO 3 ) 2 Cl, and tychite, Na 6 Mg 2 (CO 3 ) 4 (SO 4 ), are excellent case studies for the high-pressure behavior of ionic groups since their structures combine ionic complexity and high symmetry (hexagonal P6 3 /m and cubic Fd3, respectively). Here we investigate the structure and compressibility of hanksite up to 20 GPa in the diamond-anvil cell using Raman spectroscopy and X-ray diffraction and of tychite up to 17 GPa in the diamond cell using X-ray diffraction and first-principles modeling. At ambient pressure, the Raman spectrum of hanksite has a single sulfate ν 1 frequency at 992 cm -1 with a lower-frequency shoulder. As pressure is increased, this mode splits into two distinct peaks, which arise from two distinct local environments for the sulfate tetrahedra within the hanksite structure. Below 10 GPa, the mode Grüneisen parameter of the dominant sulfate ν 1 frequency is 0.27(1); the mode Grüneisen parameter of the lower frequency shoulder is 0.199(7). X-ray diffraction data of hanksite indicate a 5% volume drop between 8-10 GPa with no apparent change of symmetry. A Birch-Murnaghan fit to the data below 8 GPa yields an isothermal bulk modulus of 66(1) GPa for hanksite and 85(1) GPa for tychite, with K′ fixed at 4.

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High-pressure study of the behavior of mineral barite by x-ray diffraction

Cited by 75 publications

References 29 publications

In situhigh-pressure synchrotron x-ray diffraction study of CeVO4and TbVO4up to 50 GPa

In situhigh-pressure synchrotron x-ray diffraction study of CeVO4and TbVO4up to 50 GPa

High-pressure transition to the post-barite phase in BaCrO4hashemite

Spectroscopic and X-ray diffraction investigation of the behavior of hanksite and tychite at high pressures, and a model for the compressibility of sulfate minerals

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