ChemInform Abstract: Phase Relationships of the Quasibinary System NiCr2S4- NiGa2S4. Crystal Structure of NiGa2S4.

1986 ◽  
Vol 17 (25) ◽  
Author(s):  
H. D. LUTZ ◽  
W. BUCHMEIER ◽  
H. SIWERT
Keyword(s):  
Crystal Structure ◽  
Quasibinary System ◽  
Phase Relationships

Zum System Wasser—Fluorwasserstoff: Phasenverhalten und Kristallstruktur von 2 D2O• 3 DF, einer deuterierten Verbindung ohne protoniertes Analogon / Concerning the System Water—Hydrogen Fluoride: Phase Behaviour and Crystal Structure of 2 D2O· 3 DF, a Deuterated Compound Lacking the Protonated Analogue

1989 ◽  
Vol 44 (11) ◽  
pp. 1359-1364 ◽  
Author(s):  
Wolfgang Poll ◽  
Michaela Lohmeyer ◽  
Dietrich Mootz
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Single Crystal ◽  
Phase Behaviour ◽  
X Ray ◽  
Quasibinary System ◽  
Molecular Adduct ◽  
Oxonium Salt ◽  
System Water ◽  
Additional Phase

The melting diagram of the quasibinary system D2O— DF was determined by low-temperature DTA and X-ray powder diffraction. It was found to be largely similar to that of the corresponding non-deuterated system H2O—HF with the striking exception of an additional phase with a composition of its own, 2D2O· 3 DF, and stable between ca. —78 and —71°C. Its structure, determined from single-crystal MoKā diffractometer data at —150°C, is rhombohedral (space group R3c, Z = 6, a = 769.9, c = 1242.1 pm) and strongly related to that of NH, · 4 HF or NH4[F(HF)3] with also seven H (as to be compared to D) and five non-H (non-D) atoms per formula unit. But with the O atom involved in four hydrogen bonds, one O · · · O and three O · · · F. at distances of 273.9 and 259.5 pm, respectively, the compound appears to be a molecular adduct rather than an oxonium salt. The D atoms in the hydrogen bonds are distributed over two positions each. — The remaining intermediary phases of the deuterated system, i. e. D2O · DF, D2O· 2 DF and D2O · 4 DF, are isotypic to their protonated counterparts of known crystal structure. For D2O · DF and D2O-2 DF these results from powder patterns were confirmed by two more single-crystal studies. The ionic structures — D3OF and D3O[F(DF)], respectively — show no distinctive effect of the H/D substitution even on details of the interatomic geometries.

Crystal Structure and Phase Relationships in the Reduced-Reoxidized Ceria-Zirconia Solid Solution

2005 ◽  
pp. 1351-1354
Author(s):  
Tsuyoshi Sasaki ◽  
Yoshio Ukyo ◽  
Kotaro Kuroda ◽  
Shigeo Arai ◽  
Hiroyasu Saka
Keyword(s):  
Crystal Structure ◽  
Solid Solution ◽  
Phase Relationships

Crystal structure and phase relationships in the pseudobinary system RE5Si4–RE5Ge4 (RE=Nd and Pr) at 1273 K

2003 ◽  
Vol 348 (1-2) ◽  
pp. 150-156 ◽  
Author(s):  
H.F Yang ◽  
G.H Rao ◽  
G.Y Liu ◽  
Z.W Ouyang ◽  
W.F Liu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Pseudobinary System ◽  
Phase Relationships

Crystal Structure and Phase Relationships in the Pseudobinary System Ln5Si4—Ln5Ge4 (Ln: Nd and Pr) at 1273 K.

ChemInform ◽  
2003 ◽  
Vol 34 (14) ◽  
Author(s):  
H. F. Yang ◽  
G. H. Rao ◽  
G. Y. Liu ◽  
Z. W. Ouyang ◽  
W. F. Liu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Pseudobinary System ◽  
Phase Relationships

Crystal Structure and Phase Relationships in the Pseudobinary System Pr5Si4—Pr5Ge4.

ChemInform ◽  
2003 ◽  
Vol 34 (12) ◽  
Author(s):  
H. F. Yang ◽  
G. H. Rao ◽  
W. G. Chu ◽  
G. Y. Liu ◽  
Z. W. Ouyang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Pseudobinary System ◽  
Phase Relationships

Crystal Structure and Phase Relationships in the Pseudobinary System Nd5Si4—Nd5Ge4.

ChemInform ◽  
2003 ◽  
Vol 34 (5) ◽  
Author(s):  
H. F. Yang ◽  
G. H. Rao ◽  
G. Y. Liu ◽  
Z. W. Ouyang ◽  
W. F. Liu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Pseudobinary System ◽  
Phase Relationships

Phasenbeziehungen im System Nain—Sn und die Kristallstrukturen der intermediären Verbindungen NaInSn2 und NaInSn4 / Phase Relations in the System Naln—Sn and the Crystal Structures of the Intermediate Compounds NaInSn2 and NaInSn4

1989 ◽  
Vol 44 (5) ◽  
pp. 505-510 ◽  
Author(s):  
Wolfgang Blase ◽  
Gerhard Cordier ◽  
Rüdiger Kniep ◽  
Roswitha Schmidt
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Intermetallic Phase ◽  
Partial Structure ◽  
Zintl Phases ◽  
X Ray ◽  
Intermediate Phases ◽  
Tetrahedral Environment ◽  
Quasibinary System ◽  
Ray Methods

The quasibinary system Naln-Sn contains the intermediate phases NayInySn, Na9In9Sn2, NalnSn, Na2In2Sn3, NaInSn2 and NaInSn4. With the exception of Na2In2Sn3 (stable only between 134°C and 365°C), crystals of the ternary compounds were grown from the melt and were investigated by single crystal X-ray methods (Na9In9Sn: a = 2287.7(8) pm, F43m; Na9In9Sn2: a = 1662.4(7), c = 983.9(5) pm, P6/mmm; NaInSn: a = 486.1(2), c = 775.7(4) pm, P63/mmc; NaInSn2: a = 627.9(3), b = 654.3(3), c = 1139.6(5) pm, P212121; NaInSn4: a = 654.6(4), c = 531.6(6) pm, I4/mcm). The crystal structure of NaInSn is a representative of the Zintl-phases. with the [InSn]⁻-partial structure in a wurtzite-type arrangement. The crystal structures of NaInSn4 and NaInSn2 have been determined (R = 0.038 and 0.062, respectively). The crystal structure of NaInSn2 contains In and Sn atoms in a helical arrangement (six atoms per turn) along the α-axis direction. Interatomic bonds between neighbouring helices complete a distorted [2+2]-tetrahedral environment for every In/Sn position. The compound can be classified in terms of the Zintl concept.NaInSn4 is an isotype of the intermetallic phase Al2Cu. By this, the chemical and structural series NaInSn → NalnSn2 → NaInSn4 represents a change from Zintl-phases to an intermetallic phase.

Crystal structure and phase relationships in the pseudobinary system Pr5Si4–Pr5Ge4

2002 ◽  
Vol 339 (1-2) ◽  
pp. 189-194 ◽  
Author(s):  
H.F. Yang ◽  
G.H. Rao ◽  
W.G. Chu ◽  
G.Y. Liu ◽  
Z.W. Ouyang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Pseudobinary System ◽  
Phase Relationships

scholarly journals Feldspars defined and described: a pair of posters published by the Mineralogical Society. Sources and supporting information

2010 ◽  
Vol 74 (3) ◽  
pp. 529-551 ◽  
Author(s):  
I. Parsons
Keyword(s):  
Crystal Structure ◽  
Great Britain ◽  
Present Article ◽  
Phase Behaviour ◽  
Suggested Reading ◽  
Mineralogical Society ◽  
Phase Relationships

AbstractThe Mineralogical Society of Great Britain & Ireland has published two full-colour posters describing the feldspar minerals, designed primarily for student use. They may be downloaded free of charge by all from http://www.minersoc.org/pages/education/edu.html and are designed to be printed at A3 size, although they are legible at A4 and in greyscale. Sheet 1 deals with nomenclature, crystal structure and phase relationships, while Sheet 2 covers phase behaviour. For brevity no sources are given on the posters, and these are provided in the present article, together with supporting notes and suggested reading on the more complex topics.

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