On the Dielectric Constants of Minerals

Takubo, Jitsutaro; Ukai, Yasuo; Kakitani, Satoru

doi:10.2465/minerj1953.1.3

Cited by 18 publications

(9 citation statements)

References 4 publications

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“…Some of the variation can also be attributed to poor experimental technique, poor sample quality and decrease of ~c' at high frequencies. The Takubo et al (1953) and the mean value of 10.98 for 14 samples of epidote, also from the Tyrol, reported by Keller (1966) are ~8% smaller than the values reported by us. These differences, which are also evident in the apparent anisotropies, could be caused by compositional differences.…”

Section: Resultscontrasting

confidence: 49%

“…These differences, which are also evident in the apparent anisotropies, could be caused by compositional differences. However, because the Takubo et al (1953) values obtained for quartz are ~8% low, there is apparently a systematic error in the Takubo et al technique for measuring dielectric constants. The value of 8.6 reported by Olhoeft for a sample of epidote from Arizona is anomalously low.…”

Section: Resultsmentioning

confidence: 99%

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Dielectric constants of apatite, epidote, vesuvianite, and zoisite, and the oxide additivity rule

Shannon

Rossman

1992

Phys Chem Minerals

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Abstract. The dielectric constants and dielectric loss values of 4 Ca-containing minerals were determined at 1 MHz using a two-terminal method and empirically determined edge corrections. The results are: The deviation (A) between measured dielectric polarizabilities as determined from the Clausius-Mosotti equation and those calculated from the sum of oxide polarizabilities according to eo (mineral) = ~ eD (oxides) for vesuvianite is ~ 0.5%. The large deviations of epidote and zoisite from the additivity rule with A= +10.1 and +11.7%, respectively, are attributed to "rattling" Ca ions. The combined effects of both a large F thermal parameter and possible F-ion conductivity in fluoraparite are believed to be responsible for A = + 2-3 %. Although variation of oxygen polarizability with oxygen molar volume (Vo) is believed to affect the total polarizabilities, the variation of Vo in these Ca minerals is too small to observe the effect.

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Section: Resultscontrasting

confidence: 49%

Section: Resultsmentioning

confidence: 99%

Dielectric constants of apatite, epidote, vesuvianite, and zoisite, and the oxide additivity rule

Shannon

Rossman

1992

Phys Chem Minerals

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“…The immersion method dates back to the beginning of the last century (Schmidt, 1902). However, perhaps due to limited application the technique had faded into relative obscurity, with only a few workers utilizing the technique (Takubo et al, 1953; Andeen et al, 1970). The method was very effective for measuring the permittivity of granular samples.…”

Section: Average Permittivity Values Of Minerals Found In the Literatmentioning

confidence: 99%

Measurement of the Solid Dielectric Permittivity of Clay Minerals and Granular Samples Using a Time Domain Reflectometry Immersion Method

Robinson

2004

Vadose Zone Journal

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Both porosity and water content of rocks, sediments, and soils can be estimated from measurements of the effective dielectric permittivity. To achieve accurate modeling to obtain either water content or porosity the permittivity of the solid phase must be known. Until recently the most common method of obtaining the permittivity of the solid phase of granular materials relied on packing samples in air and using a mixing model to estimate the permittivity of the solid. This approach preassumes the correctness of the mixing models that we want to test. This work develops a recently proposed immersion methodology suitable for fine‐grained mineral samples and clay minerals. Measured permittivity values were 4.4 for ground quartz, 9.1 for Iceland Spar calcite, 6.0 for biotite mica, 5.8 for phlogopite mica, 5.3 for talc, 5.1 for kaolin, 5.8 for illite, and 5.5 for montmorillonite. The methodology was found to work well other than for the high surface montmorillonite sample where the immersion polar fluid adsorbed to the clay.

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“…Some of the variation can also be attributed to poor experimental technique, poor sample quality and decrease of x' at high frequencies. The low values of Takubo et al (1953), are probably caused by faulty technique since his values for quartz are ~ 8% low. Increasing his values by 8% increases the mean values from 6.35 to 6.90, more in line with our measurements.…”

Section: Resultsmentioning

confidence: 99%

Dielectric constants of topaz, orthoclase and scapolite and the oxide additivity rule

1992

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Abstract.The dielectric constants and dissipation factors of topaz, scapolite and orthoclase were determined at i MHz using a two-terminal method and empirically determined edge corrections. The results are: The deviation (A) between measured dielectric polarizabilities as determined from the Clausius-Mosotti equation and those calculated from the sum of ion polarizabilities according to ~o(mineral)= s for topaz is 2.5%. The large deviations of orthoclase and scapolite from the oxide additivity rule with A=+7.2 and +17.6%, respectively, are attributed to "rattling" K ions in orthoclase and "rattling" (Na, K, Ca) ions and disordered O = and C1-ions in scapolite.

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On the Dielectric Constants of Minerals

Cited by 18 publications

References 4 publications

Dielectric constants of apatite, epidote, vesuvianite, and zoisite, and the oxide additivity rule

Dielectric constants of apatite, epidote, vesuvianite, and zoisite, and the oxide additivity rule

Measurement of the Solid Dielectric Permittivity of Clay Minerals and Granular Samples Using a Time Domain Reflectometry Immersion Method

Dielectric constants of topaz, orthoclase and scapolite and the oxide additivity rule

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