Microabsorption of X-rays in Planar Powder Samples in the Non-Symmetric Reflection Case

Collazo, J. A.; Hermann, H. W.; Pitschke, W.; Wetzig, K.

doi:10.1107/s0021889896013659

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…This cell is similar to that of NH 4 FeHP 3 O 10 , which has C 2/ c space group symmetry, and so this structure was used as the initial model for the Rietveld analysis. The refinement, which utilized an asymmetry corrected pseudo-Voigt peak shape, , a linear interpolated background function, and a surface roughness correction, converged to R wp = 3.0%. The final refined structural parameters are listed in Table , with bond lengths and angles shown in Table .…”

Section: Resultsmentioning

confidence: 99%

Structural, Magnetic, and Ion-Exchange Properties of RbMnHP₃O₁₀

Wright

Attfield

1998

Inorg. Chem.

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The crystal structure, magnetic properties, and ion-exchange behavior of RbMnHP(3)O(10) have been determined. The crystal structure (a = 12.1866(3) Å, b = 8.3586(2) Å, c = 9.0763(3) Å, beta = 109.067(1) degrees, space group C2/c), determined from X-ray powder diffraction, is of NH(4)FeHP(3)O(10) type, consisting of hydrogen triphosphate anions linking Jahn-Teller distorted Mn(III)O(6) octahedra around Rb(+) cations. Magnetic susceptibility measurements and low-temperature neutron powder diffraction show that RbMnHP(3)O(10) behaves as a Curie-Weiss paramagnet at high temperatures and orders antiferromagnetically below a Néel temperature of 10 K. The magnetic structure is commensurate with the nuclear cell, and the collinear antiferromagnetic structure has magnetic symmetry group P(C)()2/c' with spins of 3.82(6) &mgr;(B) lying in the ac plane. Exchange of H(+) for Li(+) has not proved possible without a breakdown of the RbMnHP(3)O(10) framework due to strong symmetric hydrogen bonding between triphosphate anions.

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Section: Resultsmentioning

confidence: 99%

Structural, Magnetic, and Ion-Exchange Properties of RbMnHP₃O₁₀

Wright

Attfield

1998

Inorg. Chem.

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“…Diffraction data reduction and indexing were performed with the PowderX program (Dong, 1999). The non-symmetric microabsorption effect on the diffraction intensity data was corrected using the equation given by Collazo et al (1997).…”

Section: Data Collection and Reductionmentioning

confidence: 99%

The crystal structure of kiddcreekite solved using micro X-ray diffraction and the EPCryst program

Liu

Dong

et al. 2014

Mineral. mag.

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Abundant kiddcreekite grains were identified in the Zijinshan Cu-Au epithermal deposit in Fujian Province, China. The mineral occurs as polycrystalline grains, 5–300 μm in size, associated with colusite, enargite, stannoidite, mawsonite, vinciennite, hemusite, tennantite and wolframite in a predominantly covellite ore. Based on electron microprobe analysis, the empirical formula of the kiddcreekite is Cu6.2Sn0.97W0.95S7.83, without significant Se or Te contents. The crystal structure of kiddcreekite was solved using the direct-space method (EPCryst) from laboratory micro X-ray diffraction (μXRD) data and refined by the Rietveld method. The R values of the final Rietveld refinement were Rp = 9.06%, Rwp = 8.31%, RB = 3.16 and RF = 2.17%. Kiddcreekite has a cubic structure, space group F4̄3m and lattice parameter a = 10.8178(3) Å (Z = 4, V = 1265.95(6) Å3). In the unit cell, W, Sn and Cu atoms occupy the 4a, 4c and 24f Wyckoff positions, respectively, and S atoms occupy two sets of 16e Wyckoff positions. The structure of kiddcreekite consists of stacked double MeS4 layers (giving a W–Sn–Cu tier and a Cu–vacancy tier) as in the sphalerite substructure. This study also demonstrates the possibility of using laboratory µXRD data coupled with the direct-space method to solve inorganic structures in cases where samples are too small for conventional powder and single-crystal diffraction.

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Data Treatment

He¹

2009

Two‐Dimensional X‐Ray Diffraction

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Microabsorption of X-rays in Planar Powder Samples in the Non-Symmetric Reflection Case

Cited by 5 publications

References 5 publications

Structural, Magnetic, and Ion-Exchange Properties of RbMnHP₃O₁₀

Structural, Magnetic, and Ion-Exchange Properties of RbMnHP₃O₁₀

The crystal structure of kiddcreekite solved using micro X-ray diffraction and the EPCryst program

Data Treatment

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Microabsorption of X-rays in Planar Powder Samples in the Non-Symmetric Reflection Case

Cited by 5 publications

References 5 publications

Structural, Magnetic, and Ion-Exchange Properties of RbMnHP3O10

Structural, Magnetic, and Ion-Exchange Properties of RbMnHP3O10

The crystal structure of kiddcreekite solved using micro X-ray diffraction and the EPCryst program

Data Treatment

Contact Info

Product

Resources

About

Structural, Magnetic, and Ion-Exchange Properties of RbMnHP₃O₁₀

Structural, Magnetic, and Ion-Exchange Properties of RbMnHP₃O₁₀