Solution growth of sparingly soluble single crystals from soluble complexes II. Growth of α-HgI2 single crystals from iodomercurate complexes

Nicolau, I.F.

doi:10.1016/0022-0248(80)90193-1

Cited by 21 publications

(11 citation statements)

References 33 publications

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“…The much better quality of the {1 01} faces with respect to the { 1 10} faces may be accounted for by the a-HgI 2 crystal habit [3,49] and its plate-like morphology. Thus, unlike the grown-in dislocations running almost perpendicular to the { 1 10} faces, originating from the regenerated {1 10} seed faces, the grown-in dislocations, originating from the regenerated {1 01} seed faces, running almost perpendicular to the { 101 } faces, leave the advancing {10 1} growth sectors emerging on the large {0 01} pinakoid faces.…”

Section: Glide Sheets and Bands Tilt And Twist Boundaries And Kink Bmentioning

confidence: 99%

“…According to Hartman [182], such a twin is actually an intergrowth with (1 1 0) as the original composition plane in which the zone [00 1], of one individual iS parallel to the zone [1 10]i I of the other. The fact that the (1 10) plane is the original composition plane is not surprising since the (1 10) face has a certain K character containing only two weak PBC vectors B 1 [49]. So, the presence of tributhyl phosphate as a complexing agent changes the zeroorder crystallization mechanism of { 1 1 0} faces [3] in a second-order mechanism and induces the formation of twins by a faulted two-dimensional nucleation.…”

Section: Twinsmentioning

confidence: 99%

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Extended structural defects in ?-Hgl2 single crystals

Nicolau

Dupuy

Rolland

1993

J Mater Sci: Mater Electron

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Extended structural defects in both ~-Hgl 2 crystals grown in solution or from the vapourphase were studied by optical microscopy, light scattering, SEM operated in cathodoluminescence and in secondary electron mode, X-ray topography, neutron, y-and X-ray rocking curves and oscillating crystal X-ray diffraction. The observed dislocations were compared with theoretically calculated dislocations. Dislocation loops, having diameters ranging from 2 gm to 500 gm, are observed on all low index faces, Hohlstellen (lens-shaped voids) having axes along the [001] direction, less than 1 gm in thickness, and diameters lying in the (001) planes, ranging from 2 gm to 10 gm are characteristic defects. Observed plastic deformations like glide sheets and bands, tilt and twist boundaries, kink and fatigue bands, ridges and rumplings were characterized. Growth rings, spherical void inclusions 10-30 gm in diameter, orthogonal walls of forest screw dislocations parallel to {1 00} planes, and streaks (planar void sheets crossing the (001 ) planes) were only observed in crystals grown from the vapour-phase. Cross-penetration twins having {1 1 4} twin planes are described. The possible formation of stacking faults was analysed. The mosaicity of solution-grown crystals ranges from 1' to 6'. A characteristic cellular structure, having a cell size ranging from 2 I~m to 10 gm, was observed in all the crystals examined and correlated to local deviations from the stoichiometric composition. Solid lens-shaped inclusions, having diameters ranging from 3 gm to 500 gm and thicknesses ranging from 0.3 gm to 50 gm, respectively, are entrapped in many crystals and correlated to spiral hillocks observed on {0 01 } growing faces.

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Section: Glide Sheets and Bands Tilt And Twist Boundaries And Kink Bmentioning

confidence: 99%

Section: Twinsmentioning

confidence: 99%

Extended structural defects in ?-Hgl2 single crystals

Nicolau

Dupuy

Rolland

1993

J Mater Sci: Mater Electron

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“…It is known that impurities (generally speaking, these are ions, atoms, or molecules other than the compounds that constitute the growth units of the crystallizing material) affect growth rates and also growth shapes [55]. Solution growth of HgI 2 also show that ions or molecules other than HgI 2 did have an effect on the growing crytal surface, hence, on the eventual crystal morphology [20][21][22]. …”

Section: Hgi 2 Growth In the Smart Laboratorymentioning

confidence: 99%

“…Conversely, the appropriate growth method can reduce impurities and diminish the effects of crystal dislocations. First, impurity measurements revealed the inclusion of solution and solvent molecules in HgI 2 crystals grown by solution and solvent methods [20][21][22]. These contaminant molecules included impurities that work to degrade the material properties.…”

Section: Introductionmentioning

confidence: 99%

Vapor Growth of Mercuric Iodide Tetragonal Prismatic Crystals

Ariesanti¹

2013

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information pound-force/inch 2 (psi) pound-mass (lbm avoirdupois) pound-mass-foot 2 (moment of inertia) pound-mass/foot 3 rad (radiation dose absorbed) roentgen shake slug torr (mm Hg, 0 0 C) *The bacquerel (Bq) is the SI unit of radioactivity; 1 Bq = 1 event/s. **The Gray (GY) is the SI unit of absorbed radiation.1.000 000 x E -10 1.013 25 x E +2 1.000 000 x E +2 1.000 000 x E -28 1.054 350 x E +3 4.184 000 4.184 000 x E -2 3.700 000 x E +1 1.745 329 x E -2 t k = (t o f + 459.67)/1.8 1.602 19 x E -19 1.000 000 x E -7 1.000 000 x E -7 3.048 000 x E -1 1.355 818 3.785 412 x E -3 2.540 000 x E -2 1.000 000 x E +9 1.000 000 4.183 4.448 222 x E +3 6.894 757 x E +3 1.000 000 x E +2 1.000 000 x E -6 2.540 000 x E -5 1.609 344 x E +3 2.834 952 x E -2 4.448 222 1.129 848 x E -1 1.751 268 x E +2 4.788 026 x E -2 6.894 757 4.535 924 x E -1 4.214 011 x E -2 1.601 846 x E +1 1.000 000 x E -2 2.579 760 x E -4 1.000 000 x E -8 1.459 390 x E +1 1.

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“…Mercury(II) iodide, itself sparingly soluble in water, is readily solubilized by various iodide salts, including potassium iodide, as well as by hydrogen iodide, through the formation of complex polyiodides, [HgI 3 ] - and [HgI 4 ] 2- . − Evaporation or slow cooling generally results in the crystallization of mercury(II) iodide, , although an early report noted the inhibition of crystal growth due to the adsorption of polyiodide complexes . Evaporation of HgI 2 /HI solutions in a vacuum desiccator over sodium hydroxide, serving to remove HI from solution, afforded thin platelets of α-HgI 2 up to ca.…”

Section: Mercury(ii) Iodidementioning

confidence: 99%

Crystallization of Solid-State Materials via Decomplexation of Soluble Complexes

Doxsee

1998

Chem. Mater.

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A variety of compounds which are at best sparingly soluble in aqueous media may be readily brought into solution through the formation of soluble coordination complexes. Modification of experimental conditions through, e.g., dilution or slow removal of the complexing agent, leads to supersaturation and, consequently, crystallization of the original solid-state phase. This technique of decomplexation crystallization, both of simple inorganic coordination complexes and of complexes with macrocyclic organic chelating agents, offers the opportunity both to effect the recrystallization of sparingly soluble species and to modify their crystal morphology. Similarly, precursors for solid-state materials may be solubilized in nonaqueous solvents through the formation of soluble complexes and then allowed to undergo reaction crystallization, allowing the examination of both solvent effects and chelation effects on the morphology and phase of the resulting solid-state materials. These effects are often dramatic, and such “complexation-mediated crystallization” approaches offer promise for the facile preparation of metastable phases from simple precursors under ambient conditions.

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Solution growth of sparingly soluble single crystals from soluble complexes II. Growth of α-HgI2 single crystals from iodomercurate complexes

Cited by 21 publications

References 33 publications

Extended structural defects in ?-Hgl2 single crystals

Extended structural defects in ?-Hgl2 single crystals

Vapor Growth of Mercuric Iodide Tetragonal Prismatic Crystals

Crystallization of Solid-State Materials via Decomplexation of Soluble Complexes

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