Ferrous tainiolite, Cs[Fe2Li]
o
[Si4]
t
O10F2, has been synthesized from the melt in gastight molybdenum
crucibles. The electric conductivity has been measured by impedance spectroscopy. As compared to
natural micas, which are insulators, good conductivity is observed. The layered silicate can be further
modified by ion exchange, which makes it a promising host structure for sensor materials. The estimated
activation energy is as low as 0.79 eV. Upon Ba2+ exchange for Cs+, structural Fe2+ is partially oxidized
(33%), and the layer charge is reduced significantly, resulting in a coarse-grained but swollen (monolayer
hydrate) smectite-type layered silicate. Therefore, further functionalization by pillaring will be feasible
resulting in a conducting microporous material. The new material has been characterized by the analysis
of chemical composition (wavelength dispersive X-ray spectroscopy and laser ablation-inductively coupled
plasma−mass spectrometry), differential thermal analysis, electron microscopy, Mössbauer, UV−vis/NIR, impedance spectroscopy, and single-crystal structure refinement (wR(F
2) = 0.0883). The structure
is of the 1M polytype (C2/m) with cell parameters a = 5.277(2) Å, b = 9.148(2) Å, c = 10.804(2) Å,
and β = 99.19(3)°. The congruent melting point was observed at 1103 (±5) K.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.