In:
Clays and Clay Minerals, Cambridge University Press (CUP), Vol. 45, No. 6 ( 1997-12), p. 781-788
Abstract:
The crystal structure of synthetic deuterated kaolinite was refined by Rietveld analysis using time-of-flight (TOF) neutron powder diffraction data. For non-hydrogen atoms, Cl symmetry was assumed. Starting models were tested in which only the direction of O-D vectors was varied. The constraints were introduced to all Al-O, Si-O and O-D bonds. The refinement adopting the former gives Pl (C1), a = 5.169(1) Å, b = 8.960(2) Å, c = 7.410(2) Å, α = 91.26(2)°, ß = 104.99(2)°, γ = 89.93(1)°, R wp = 3.17%, R 1 = 5.78% and S = 1.34 with constraints of l (Al-O)= 1.93 ± 0.05 Å, l (Si-O)= 1.62 ± 0.03 Å and l (D-O) = 0.95 ± 0.15 Å. The inner O-D vector points toward the tetrahedral sheet. All inner-surface O-D groups form H bonding with basal O atoms in the next kaolinite layers. The results agreed with those obtained from natural kaolinite.
Type of Medium:
Online Resource
ISSN:
0009-8604
,
1552-8367
DOI:
10.1346/CCMN.1997.0450602
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
1997
detail.hit.zdb_id:
2045991-9
detail.hit.zdb_id:
221428-3
SSG:
13
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