Transport properties of the mineral vermiculite

M. Stanley Whittingham

doi:10.1016/0167-2738(89)90239-7

Transport properties of the mineral vermiculite

M. Stanley Whittingham

Chemistry

Binghamton University

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

The ionic conductivity of single crystals of magnesium and calcium ion-exchanged Llano vermiculite have been measured in an attempt to determine the nature of the dominant mobile species. The calcium ions diffuse much more rapidly than magnesium ions in vermiculite and even faster than calcium ions in β-alumina. Analysis of the pre-exponential factor in the temperature dependence of the conductivity suggests a high activation entropy of motion; this may be associated with the loss of more than three waters of hydration from the cation during jumps from site to site.

Original language	English
Pages (from-to)	344-349
Number of pages	6
Journal	Solid State Ionics
Volume	32-33
Issue number	PART 1
DOIs	https://doi.org/10.1016/0167-2738(89)90239-7
State	Published - 1989

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10.1016/0167-2738(89)90239-7

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title = "Transport properties of the mineral vermiculite",

abstract = "The ionic conductivity of single crystals of magnesium and calcium ion-exchanged Llano vermiculite have been measured in an attempt to determine the nature of the dominant mobile species. The calcium ions diffuse much more rapidly than magnesium ions in vermiculite and even faster than calcium ions in β-alumina. Analysis of the pre-exponential factor in the temperature dependence of the conductivity suggests a high activation entropy of motion; this may be associated with the loss of more than three waters of hydration from the cation during jumps from site to site.",

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T1 - Transport properties of the mineral vermiculite

AU - Stanley Whittingham, M.

PY - 1989

Y1 - 1989

N2 - The ionic conductivity of single crystals of magnesium and calcium ion-exchanged Llano vermiculite have been measured in an attempt to determine the nature of the dominant mobile species. The calcium ions diffuse much more rapidly than magnesium ions in vermiculite and even faster than calcium ions in β-alumina. Analysis of the pre-exponential factor in the temperature dependence of the conductivity suggests a high activation entropy of motion; this may be associated with the loss of more than three waters of hydration from the cation during jumps from site to site.

AB - The ionic conductivity of single crystals of magnesium and calcium ion-exchanged Llano vermiculite have been measured in an attempt to determine the nature of the dominant mobile species. The calcium ions diffuse much more rapidly than magnesium ions in vermiculite and even faster than calcium ions in β-alumina. Analysis of the pre-exponential factor in the temperature dependence of the conductivity suggests a high activation entropy of motion; this may be associated with the loss of more than three waters of hydration from the cation during jumps from site to site.

UR - https://www.scopus.com/pages/publications/0024612613

U2 - 10.1016/0167-2738(89)90239-7

DO - 10.1016/0167-2738(89)90239-7

M3 - Article

SN - 0167-2738

VL - 32-33

SP - 344

EP - 349

JO - Solid State Ionics

JF - Solid State Ionics

IS - PART 1

ER -

Transport properties of the mineral vermiculite

Abstract

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