The crystal structure of taeniolite, KLiMg2Si4O10F2

Toraya, Hideo; Iwai, Shin-ichi; Μarumo, F.; Hiráo, Minoru

doi:10.1524/zkri.1977.146.1-3.73

Cited by 40 publications

(18 citation statements)

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“…No significant residual electron densities were observed in the difference-Fourier map in the case of the vertical model. The obtained positional parameters of the atoms in the mica portion are compatible with those of TN refined by the single crystal X-ray method (Toraya et al 1977). For the specimen whose data were submitted to least-squares refinement, TG-DTA and carbon analysis data indicate the mole ratio of TN to R6G is 0.45 to 1.00.…”

Section: Discussionsupporting

confidence: 53%

“…In the calculation, lattice parameters a and b of K-taeniolite (Toraya et al 1977) were assumed for those of LiTN. In the case of the parallel arrangement, a change from single-to doublelayered intercalation is inevitable; alternatively, the vertical model allows a single-layered state for the whole range of R6G content.…”

Section: Discussionmentioning

confidence: 99%

“…The observed intensities were corrected for random powder Lorentz-polarization factor. The starting parameters of the mica portion of the structure for the least=squares and Fourier synthesis were taken from the refined parameters for K-TN obtained by the single crystal XRD method (Toraya et al 1977). Their work also provided the grounds for assuming a centrosymmetrical structure for the R6G-TN complex.…”

Section: Refinementmentioning

confidence: 99%

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Intercalation Characteristics of Rhodamine 6G in Fluor-Taeniolite: Orientation in the Gallery

Fujita

1997

Clays and clay miner.

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Abstract--The orientation of rhodamine 6G (R6G) in the 22-,~ basal-spaced complex with Li-fluortaeniolite has been studied using X-ray powder diffraction, 1-dimensional Fourier analysis, polarized infrared (IR) spectroscopy, carbon analysis and thermal analysis. The R6G was adsorbed by cation exchange in aqueous solution. In the range of 0.086 to 0.46 molar ratio of R6G to taeniolite, the basal spacings of the complex were nearly constant at 21.7 to 22.2 ,~. From X-ray diffraction (XRD) data, it was confirmed that R6G in the complex orients with its longest xanthene ring axis perpendicular to the ab plane of the host. The pleochroism of IR absorption bands at 1331, 1517, 1537 and 1621 cm -1 supports the vertical orientation. The wide stability range of the vertical configuration is consistent with the strong coulombic force between the highly negatively charged silicate layer of the host [cation exchange capacity (CEC) = 157 _+ 9 meq/100 g] and the positively charged nitrogen bonded to both sides of the R6G xanthene ring.

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Section: Discussionsupporting

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Section: Refinementmentioning

confidence: 99%

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Intercalation Characteristics of Rhodamine 6G in Fluor-Taeniolite: Orientation in the Gallery

Fujita

1997

Clays and clay miner.

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“…5. In addition, the reported basal spacing and lattice constant b of trisilicic type mica [8,9], tetrasilicic type mica [10][11][12], and mica in the previous specimens [2] are plotted as a reference in Fig. 5.…”

Section: Phase Change By Heatingmentioning

confidence: 99%

Preparation and ionic conductivity of transparent glass−ceramics containing a large quantity of lithium−mica

Taruta¹,

Suzuki²,

Yamakami³

et al. 2008

Journal of Non-Crystalline Solids

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In order to crystallize a large quantity of the lithium-mica in glass-ceramics, 5.1 mass% MgF 2 was added to the starting materials of the parent glasses having chemical compositions of Li (1+x) Mg 3 AlSi 3(1+x) O 10+6.5x F 2 (x=0.5 and 1.0). Transparent glass-ceramics, in which a large quantity of lithium-mica with particle size of < 50 nm was separated, could be prepared from the MgF 2 -added parent glass with x=0.5. While the parent glass, which had a binodal phase separation structure, did not exhibit electrical conductivity, the transparent glass-ceramic was given conductivity by the formation of an interlocking structure of mica. As the separated mica formed a tighter interlocking structure, the conductivity increased and reached a value of 2.0 × 10 -3 S/cm at 600ºC. The MgF 2 -added parent glass with x=1.0 was not transparent because of coarse spinodal phase separation. The conductivity was 4.3× 10 -4 S/cm at 600ºC but was significantly decreased by the separation of mica.

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“…3. In addition, the reported basal spacing and lattice constant b of trisilicic type micas [2,16,17], tetrasilicic type micas [18][19][20] and brittle mica (kinoshitalite) [21] are plotted as a reference in the Fig. 3.…”

Section: Crystallization Processmentioning

confidence: 99%

Crystallization process and some properties of novel transparent machinable calcium-mica glass-ceramics

Taruta

Sakata

Yamaguchi

et al. 2008

Ceramics International

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Bulk glass having a calcium-mica composition (Ca 0.5 Mg 3 AlSi 3 O 10 F 2 ) is homogeneous glass. The crystallization mechanism of the mica is surface crystallization and transparency is lost completely when crystallization occurs on the surface. In this study, by decreasing SiO 2 and increasing CaO and Al 2 O 3 from the chemical composition of Ca 0.5 Mg 3 AlSi 3 O 10 F 2 , and moreover by replacing a small amount of K 2 O instead of CaO, the phase separation appears in the glasses. Because of this phase separation, the mica begins to be crystallized not only on the surface but also in the bulk at lower temperatures. Consequently, the novel transparent machinable mica glass-ceramic can be obtained by heating the glasses having the chemical composition of Ca 0.6 Mg 3 Al 1.2 Si 2.8 O 10 F 2 and K 0.01 Ca 0.595 Mg 3 Al 1.2 Si 2.8 O 10 F 2 . As a larger amount of calcium-mica is separated, the bending strength decreases and the fracture toughness increases. Furthermore, by replacing K + ion instead of Ca 2+ ion in the interlayer of calcium-mica, the interlayer bonding strength becomes high, resulting in the increase of the bending strength.

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The crystal structure of taeniolite, KLiMg₂Si₄O₁₀F₂

Abstract: Taeniolite, KLiMg

Cited by 40 publications

References 0 publications

Intercalation Characteristics of Rhodamine 6G in Fluor-Taeniolite: Orientation in the Gallery

Intercalation Characteristics of Rhodamine 6G in Fluor-Taeniolite: Orientation in the Gallery

Preparation and ionic conductivity of transparent glass−ceramics containing a large quantity of lithium−mica

Crystallization process and some properties of novel transparent machinable calcium-mica glass-ceramics

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