scholarly journals Hydrothermal Crystal Growth of Rare Earth Tin Cubic Pyrochlores, RE2Sn2O7 (RE = La–Lu): Site Ordered, Low Defect Single Crystals

2019 ◽  
Vol 19 (9) ◽  
pp. 4920-4926 ◽  
Author(s):  
Matthew Powell ◽  
Liurukara D. Sanjeewa ◽  
Colin D. McMillen ◽  
Kate A. Ross ◽  
Colin L. Sarkis ◽  
...  
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
Single Crystals ◽  
Hydrothermal Crystal Growth

Trends in Rare Earth Thiophosphate Syntheses: Rb3Ln(PS4)2 (Ln = La, Pr, Ce), Rb3-xNaxLn(PS4)2 (Ln = Pr, Ce; x = 0.50, 0.55), and RbEuPS4 Obtained by Molten Flux Crystal Growth

CrystEngComm ◽  
2021 ◽  
Author(s):  
Logan S Breton ◽  
Mark D. Smith ◽  
Hans-Conrad Zur Loye
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
Single Crystals ◽  
Molten Flux

Single crystals of new rubidium rare earth thiophosphates with the formulas Rb3Ln(PS4)2 (Ln = La, Pr, Ce), Rb3-xNaxLn(PS4)2 (Ln = Pr, Ce; x = 0.50, 0.55), and RbEuPS4 were crystallized...

Crystal growth of rare-earth-doped ternary potassium lead chloride single crystals by the Bridgman method

2004 ◽  
Vol 26 (4) ◽  
pp. 359-363 ◽  
Author(s):  
M Voda ◽  
M Al-Saleh ◽  
G Lobera ◽  
R Balda ◽  
J Fernández
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
Single Crystals ◽  
Bridgman Method ◽  
Lead Chloride ◽  
Rare Earth Doped

Hydrothermal Crystal Growth and Crystal Structures of the Mercury(II) Chromates(VI) α-HgCrO4, β-HgCrO4, and HgCrO4·H2O

2006 ◽  
Vol 61 (6) ◽  
pp. 708-714 ◽  
Author(s):  
Berthold Stöger ◽  
Matthias Weil
Keyword(s):  
Crystal Growth ◽  
Single Crystal ◽  
Single Crystals ◽  
Crystal Structures ◽  
Chromic Acid ◽  
Structure Type ◽  
Data Sets ◽  
Hydrothermal Conditions ◽  
Hydrothermal Crystal Growth ◽  
Structure Factors

Single crystals of α-HgCrO4, β -HgCrO4 and HgCrO4 ・ H2O were obtained by reacting yellow HgO in chromic acid of various concentrations under hydrothermal conditions at 200 °C (4 d). All crystal structures were solved and refined from single crystal diffractometer data sets [α-HgCrO4: P21/n, Z = 4, a = 5.5079(8), b = 8.5266(12), c = 7.3503(10) Å , β = 94.022(3)°, 955 structure factors, R[F2 > 2σ (F2)] = 0.0296; β -HgCrO4: Cmcm, Z = 4, a = 5.7187(9), b = 9.0169(14), c = 7.0114(11) Å, 361 structure factors, R[F2 > 2σ (F2)] = 0.0275; HgCrO4 ・ H2O: P1̅, Z = 2, a=5.6157(15), b =6.1115(16), c= 7.590(2) Å , α =108.850(5), β =91.666(5), γ =116.569(5)°, 1235 structure factors, R[F2 > 2σ (F2)] = 0.0316]. The previously reported structure of α-HgCrO4 has been re-determined. It contains distorted [HgO7] pentagonal bipyramids in which the short bonds are directed towards the apices. The new polymorph β -HgCrO4 adopts the CrVO4 (β -CrPO4) structure type and is composed of slightly distorted [HgO6] octahedra. The previously unknown monohydrate HgCrO4 ・ H2O crystallizes in an unique structure and is composed of one nearly regular [HgO4(H2O)2] octahedron and one considerably distorted [HgO6] octahedron. All three structures contain tetrahedral chromate anions CrO42− as the second building units with average Cr-O distances of ca. 1.65 Å

Some experiments on the crystal growth and characterization of Fe17R2 (R = rare earth) single crystals by the Bridgman method

1997 ◽  
Vol 171 (1-2) ◽  
pp. 125-130 ◽  
Author(s):  
A.A. Coelho ◽  
S. Gama ◽  
C.A. Ribeiro ◽  
N.L. Sanjurjo ◽  
Ch.V. Mohan ◽  
...  
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
Single Crystals ◽  
Bridgman Method

Synthesis of R2 Fe14 B Single Crystals

1987 ◽  
Vol 96 ◽  
Author(s):  
B. N. Das ◽  
N. C. Koon
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
Single Crystals ◽  
Growth Process ◽  
Alloy Composition ◽  
Crystal Quality ◽  
Solidification Microstructure ◽  
Growth Processes ◽  
Crystal Growth Process ◽  
Isomorphous Replacement

ABSTRACTSingle crystals of R2 Fe14 B weighing 5 to 15 g were grown from a liquid melt by tri-arc and levitation Czochralski methods. The arc method was used for the growth of smaller size crystals from 5 to 7 g, and the levitation method was used for the growth of larger sizes, from 10 to 15 g. Crystals of (R1)2 –x(R2)xFe14 B could also be grown with isomorphous replacement of rare earth atoms. The starting alloy composition for the crystal growth process was chosen based on solidification microstructure. In this paper we discuss the solidification microstructure, isomorphous replacement, seeding and their interactions with the crystal growth processes and crystal quality.

scholarly journals Hydrothermal crystal growth of 2-D and 3-D barium rare earth germanates: BaREGeO4(OH) and BaRE10(GeO4)4O8 (RE = Ho, Er)

2019 ◽  
Vol 786 ◽  
pp. 489-497 ◽  
Author(s):  
Kyle Fulle ◽  
Liurukara D. Sanjeewa ◽  
Colin D. McMillen ◽  
Channa R. De Silva ◽  
Katarina Ruehl ◽  
...  
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
Hydrothermal Crystal Growth ◽  
Rare Earth Germanates

Materials Discovery by Crystal Growth

2006 ◽  
Vol 988 ◽  
Author(s):  
Samuel J. Mugavero III ◽  
William R Gemmill ◽  
Hans-Conrad zur Loye
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
High Temperature ◽  
Water Content ◽  
Single Crystals ◽  
Metal Cations ◽  
Platinum Group Metal ◽  
New Materials ◽  
Slow Cooling ◽  
Molten Hydroxides

AbstractThe growth of new phases out of high temperature hydroxide solutions as a means of discovering new materials is discussed. We have succeeded in solubilizing rare earth cations and platinum group metal cations in molten hydroxides and have grown single crystals with a large number of new compositions and new structure types. The use of sealed silver tubes has enabled us to control the water content and, hence, the acidity of the hydroxide melts, and thereby to grow crystals via slow cooling. The synthetic conditions and structures of several new oxides including Ln1-xNa1+xIrO4 (Ln = Gd-Er, Y; x = 0.04-0.26), Ln3RuO7 (Ln = La, Sm, Eu), LnNaPd6O8 (Ln = Tb-Lu, Y) and La9RbIr4O24 are presented.

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