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A comparison of powder diffraction studies of kaolin group minerals

Published/Copyright: July 28, 2010
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Zeitschrift für Kristallographie - Crystalline Materials
From the journal Zeitschrift für Kristallographie - Crystalline Materials Volume 210 Issue 3

Abstract

In order to evaluate the precision and/or accuracy of the refined parameters, the interatomic distances d(Si–O) and d(Al–O) calculated from the data reported in ten powder refinements of both well ordered and partially disordered kaolinite and dickite specimens were compared. The main tool used in our considerations were median-based box-and-whisker plots. It was found that the d(Si–O) lie within the interval 〈1.43, 1.87〉 Å, while d(Al–O) vary from 〈1.64, 2.12〉 Å; the expected values being 1.617 Å and 1.91 Å, respectively. The comparison of powder refinements with two reliable single crystal analyses of dickite has shown that the spread of distances in only one case is comparable with single-crystal refinements. The authors have reported rather precise but inaccurate distances or vice versa. All powder refinements have provided very close median distances, but the sizes of the boxes vary significantly from one refinement to another. The accuracy of the interatomic distances obtained from powder refinements is almost independent on the presence or absence of disorder in the structure.

Published Online: 2010-7-28
Published in Print: 1995-3-1

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Articles in the same Issue

  1. A new method for measuring absolute optical path differences without external compensation
  2. The crystallographic calculation of the elements of mechanical twinning in crystals
  3. Edge-bicolorings of regular polyhedra
  4. A comparison of powder diffraction studies of kaolin group minerals
  5. Crystal growth and reinvestigation of the crystal structure of crednerite, CuMnO2
  6. Die Kristallstruktur des Bleigermanats Pb11Ge3O17
  7. Hydrogen bonding in crystalline L-His H+ · H2PO4− · H2O
  8. The crystal structure of calcium glutarate monohydrate
  9. Structures cristallines du 4-bromo-2-méthoxy-1-méthyl-5-nitro et du 4-bromo-2-cyano-1-méthyl-5-nitroimidazoles obtenus par substitution nucléophile à partir du 2,4-dibromo-1-méthyl-5-nitroimidazole
  10. Crystal structures of 2-[bis(triphenylphosphine)silver(I)]benzisothiazol-3(2H)-one 1,1-dioxide and 2-[bis(triphenylphosphine)silver(I)]-4,5-dimethylisothiazol-3(2H)-one 1,1-dioxide · ethanol
  11. Crystal structure of phenyl 1-hydroxy-2-naphthoate, an unexpected product from an attempted aryl aryl coupling reaction1
  12. Polytypism of vapor grown PbI2 crystals
  13. Efficient use of measuring time on conventional diffractometers: a discussion document for practising crystallographers
  14. Redetermination of the crystal structure of manganese ultraphosphate, MnP4O11
  15. Crystal structure of tripotassium diselenoaurate(I), K3AuSe2
  16. Crystal structure of 2,3,4-triphenyl-5,7-difluor-8-(trans-stilbenyl)-2,3-dihydrocinnoline, C40H28F2N2
  17. Crystal structure of p-bis(tert-butyl-trimethylsiloxyl-methyliden-phosphino)-benzene,(C4H9C((CH3)3SiO)P)2C6H4
  18. Crystal structure of 7,8-dihydro-6H-dipyrido[1,2-a;2,1-c]-[1,4]-diazepinium bis(cis-1,2-dicyanoethene-1,2-dithiolato)nickelate, (C5H4N)2(CH2)3)(Ni(S2C2(CN)2)2
  19. Crystal structure of methyl-3-bis(trimethylsilyl)-amino-indolizine-2-carboxylate, CO2CH3(C8NH5)N(Si(CH3)3)2
  20. Crystal structure of tris(2,2′-bipyridyl)-zinc(II) Perchlorate, (Zn(C10H8N2)3)(ClO4)2
  21. Crystal structure of 1,8-bis(4-trifluoromethylphenyl)naphthalene, C24H14F6
  22. Crystal structure of α-amino-α-(2,6-dichlorophenyl)-cyclohexane-2,6-dione, C13H11Cl2NO2
  23. Crystal structure of (Z)-N-phthaloyl-2,3-dehydrophenylalanine methyl ester, C18H13NO4
  24. Crystal structure of (S)-2-pivaloylamino-3-(4′-hydroxyphenyl)-propionohydrazide, C14H21N3O3
  25. Crystal structure of 1-methoxycarbonyl-4-oxo-2-methyl-2-pentylidene-triphenylphosphorane, C26H25O3P
  26. Crystal structure of 1-acyl-4-oxo-hexylidene-triphenylphosphorane, C26H27O2P
  27. Crystal structure of 2,3,4,5-tetraphenyl-6-benzylidene-pyran, C36H26O
https://doi.org/10.1524/zkri.1995.210.3.177

Articles in the same Issue

  1. A new method for measuring absolute optical path differences without external compensation
  2. The crystallographic calculation of the elements of mechanical twinning in crystals
  3. Edge-bicolorings of regular polyhedra
  4. A comparison of powder diffraction studies of kaolin group minerals
  5. Crystal growth and reinvestigation of the crystal structure of crednerite, CuMnO2
  6. Die Kristallstruktur des Bleigermanats Pb11Ge3O17
  7. Hydrogen bonding in crystalline L-His H+ · H2PO4− · H2O
  8. The crystal structure of calcium glutarate monohydrate
  9. Structures cristallines du 4-bromo-2-méthoxy-1-méthyl-5-nitro et du 4-bromo-2-cyano-1-méthyl-5-nitroimidazoles obtenus par substitution nucléophile à partir du 2,4-dibromo-1-méthyl-5-nitroimidazole
  10. Crystal structures of 2-[bis(triphenylphosphine)silver(I)]benzisothiazol-3(2H)-one 1,1-dioxide and 2-[bis(triphenylphosphine)silver(I)]-4,5-dimethylisothiazol-3(2H)-one 1,1-dioxide · ethanol
  11. Crystal structure of phenyl 1-hydroxy-2-naphthoate, an unexpected product from an attempted aryl aryl coupling reaction1
  12. Polytypism of vapor grown PbI2 crystals
  13. Efficient use of measuring time on conventional diffractometers: a discussion document for practising crystallographers
  14. Redetermination of the crystal structure of manganese ultraphosphate, MnP4O11
  15. Crystal structure of tripotassium diselenoaurate(I), K3AuSe2
  16. Crystal structure of 2,3,4-triphenyl-5,7-difluor-8-(trans-stilbenyl)-2,3-dihydrocinnoline, C40H28F2N2
  17. Crystal structure of p-bis(tert-butyl-trimethylsiloxyl-methyliden-phosphino)-benzene,(C4H9C((CH3)3SiO)P)2C6H4
  18. Crystal structure of 7,8-dihydro-6H-dipyrido[1,2-a;2,1-c]-[1,4]-diazepinium bis(cis-1,2-dicyanoethene-1,2-dithiolato)nickelate, (C5H4N)2(CH2)3)(Ni(S2C2(CN)2)2
  19. Crystal structure of methyl-3-bis(trimethylsilyl)-amino-indolizine-2-carboxylate, CO2CH3(C8NH5)N(Si(CH3)3)2
  20. Crystal structure of tris(2,2′-bipyridyl)-zinc(II) Perchlorate, (Zn(C10H8N2)3)(ClO4)2
  21. Crystal structure of 1,8-bis(4-trifluoromethylphenyl)naphthalene, C24H14F6
  22. Crystal structure of α-amino-α-(2,6-dichlorophenyl)-cyclohexane-2,6-dione, C13H11Cl2NO2
  23. Crystal structure of (Z)-N-phthaloyl-2,3-dehydrophenylalanine methyl ester, C18H13NO4
  24. Crystal structure of (S)-2-pivaloylamino-3-(4′-hydroxyphenyl)-propionohydrazide, C14H21N3O3
  25. Crystal structure of 1-methoxycarbonyl-4-oxo-2-methyl-2-pentylidene-triphenylphosphorane, C26H25O3P
  26. Crystal structure of 1-acyl-4-oxo-hexylidene-triphenylphosphorane, C26H27O2P
  27. Crystal structure of 2,3,4,5-tetraphenyl-6-benzylidene-pyran, C36H26O
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