High-pressure, high-temperature single-crystal study of Bi-IV

2012 ◽  
Vol 32 (3) ◽  
pp. 442-449 ◽  
Author(s):  
Wanaruk Chaimayo ◽  
Lars F. Lundegaard ◽  
Ingo Loa ◽  
Graham W. Stinton ◽  
Alistair R. Lennie ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystal ◽  
High Pressure High Temperature ◽  
Single Crystal Study

scholarly journals High-Pressure Synthesis, Crystal Structure, and Photoluminescence Properties of β-Y2B4O9:Eu3+

Inorganics ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 136
Author(s):  
Fuchs ◽  
Schröder ◽  
Heymann ◽  
Jüstel ◽  
Huppertz
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
High Temperature ◽  
Single Crystal ◽  
Photoluminescence Properties ◽  
Triclinic Space Group ◽  
Space Group ◽  
High Pressure High Temperature ◽  
Temperature Experiment ◽  
Pressure Synthesis

A high-pressure/high-temperature experiment at 7.5 GPa and 1673 K led to the formation of the new compound βY2B4O9. In contrast to the already known polymorph αY2B4O9, which crystallizes in the space group C2/c, the reported structure could be solved via single-crystal Xray diffraction in the triclinic space group P1 (no. 2) and is isotypic to the already known lanthanide borates βDy2B4O9 and βGd2B4O9. Furthermore, the photoluminescence of an europium doped sample of βY2B4O9:Eu3+ (8%) was investigated.

High-pressure syntheses and crystal structures of orthorhombic DyGaO3 and trigonal GaBO3

2015 ◽  
Vol 70 (4) ◽  
pp. 207-214 ◽  
Author(s):  
Daniela Vitzthum ◽  
Stefanie A. Hering ◽  
Lukas Perfler ◽  
Hubert Huppertz
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystal ◽  
Crystal Structures ◽  
Diffraction Data ◽  
Room Temperature ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
High Pressure High Temperature

AbstractOrthorhombic dysprosium orthogallate DyGaO3 and trigonal gallium orthoborate GaBO3 were synthesized in a Walker-type multianvil apparatus under high-pressure/high-temperature conditions of 8.5 GPa/1350 °C and 8 GPa/700 °C, respectively. Both crystal structures could be determined by single-crystal X-ray diffraction data collected at room temperature. The orthorhombic dysprosium orthogallate crystallizes in the space group Pnma (Z = 4) with the parameters a = 552.6(2), b = 754.5(2), c = 527.7(2) pm, V = 0.22002(8) nm3, R1 = 0.0309, and wR2 = 0.0662 (all data) and the trigonal compound GaBO3 in the space group R3̅c (Z = 6) with the parameters a = 457.10(6), c = 1419.2(3) pm, V = 0.25681(7) nm3, R1 = 0.0147, and wR2 = 0.0356 (all data).

scholarly journals High-pressure Synthesis and Crystal Structure of the Borate Sc3B5O12

2009 ◽  
Vol 64 (11-12) ◽  
pp. 1339-1344 ◽  
Author(s):  
Stephanie C. Neumair ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Rare Earth ◽  
High Temperature ◽  
Single Crystal ◽  
Structure Determination ◽  
Synthesis And Crystal Structure ◽  
High Pressure High Temperature ◽  
Rare Earth Borate ◽  
Pressure Synthesis

The rare-earth borate Sc3B5O12 was synthesized under high-pressure / high-temperature conditions of 6 GPa and 1100 °C in a Walker-type multianvil apparatus. The single-crystal structure determination revealed an isotypy to RE3B5O12 (RE = Er-Lu). Sc3B5O12 crystallizes in the rare space group Pmna (Z = 4) with the parameters a = 1245.4(3), b = 443.46(9), c = 1222.1(2) pm, V = 0.675(1) nm3, R1 = 0.0520, and wR2 = 0.0860 (all data). The structure of Sc3B5O12 is composed of layers of condensed BO4 tetrahedra, separated by eight-fold coordinated scandium ions

scholarly journals Al5B12O25(OH) and Ga4InB12O25(OH) – two additional triel borates with the structure type M5B12O25(OH) (M = Ga, In)

2020 ◽  
Vol 75 (6-7) ◽  
pp. 605-613
Author(s):  
Daniela Vitzthum ◽  
Daniel S. Wimmer ◽  
Ingo Widmann ◽  
Hubert Huppertz
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Ir Spectroscopy ◽  
Single Crystal ◽  
Crystal Structures ◽  
Structure Type ◽  
Hydroxyl Groups ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Pressure High Temperature

AbstractThe isotypic triel borates Al5B12O25(OH) and Ga4InB12O25(OH) were synthesized in a Walker-type multianvil apparatus under high-pressure/high-temperature conditions of 12.0 GPa/1400 °C and 12.3 GPa/1200 °C, respectively. The crystal structures of both compounds, determined by single-crystal X-ray diffraction, constitute new representatives of the structure type M5B12O25(OH) (M = Ga, In) crystallizing in the space group I41/acd. The presence of the hydroxyl groups was confirmed via single-crystal IR spectroscopy.

Notizen: Einkristall-Daten der Hochdruck- Hochtemperaturphase von SrSi2 / Single Crystal Data of the High Pressure-High Temperature Phase of SrSi2

1983 ◽  
Vol 38 (7) ◽  
pp. 899-900 ◽  
Author(s):  
Jürgen Evers ◽  
Gilbert Oehlinger ◽  
Armin Weiss
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystal ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Crystal Data ◽  
Interatomic Distances ◽  
High Pressure High Temperature

Abstract The high pressure-high temperature phase of SrSi2 is a stoichiometric representative of the a-ThSi2 type of structure. A single crystal investigation leads to interatomic distances Si-Si: 233.0(2) pm (1 x) and 248.9(2) pm (2 x), Sr-Si: 319.1(4) pm (4 x) and 334.7(4) pm (8 x), Sr-Sr: 410.8(3) pm (4 x) and 443.8(3) pm (4 x).

Single-crystal structure of pyrite-type HP-Pd0.84(1)Se2 prepared by high-pressure/ high-temperature synthesis

2018 ◽  
Vol 73 (12) ◽  
pp. 979-985 ◽  
Author(s):  
Elisabeth Selb ◽  
Martina Tribus ◽  
Gunter Heymann
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystal ◽  
Defect Formation ◽  
Three Dimensional ◽  
Type Structure ◽  
Ambient Conditions ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
High Pressure High Temperature

AbstractAt ambient conditions, PdSe2 dichalcogenides crystallize in the layered PdS2-type structure. If pressure is applied, the coordination number of palladium atoms increases and the three-dimensional pyrite-type structure with octahedral (PdSe6)4− coordination geometry is observed. For the first time, single crystals of a pyrite-type PdSe2 modification could be obtained and characterized, which were grown by multianvil high-pressure/high-temperature synthesis at 7.5 GPa and 1023 K. The crystals show the expected pyrite-type space group Pa3̅ (no. 205) and refinement results of a=613.26(3) pm, R1=0.0233, and wR2=0.0247 (all data) were received for HP-Pd0.84(1)Se2. The single-crystal data revealed significant defect formation on the palladium site with 16% vacancies, which is in line with the orthorhombic PdX2-type high-pressure polymorphs HP-Pd0.94(1)S2 and HP-Pd0.88(1)Se2. The tendency of vacancy formation on the palladium site could also be verified by EDX measurements.

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