Determination of montmorillonite and amorphous phase in the clay reference material by the Rietveld refinement
Creators
- 1. Meiji University, Graduate School of Science and Technology, Department of Applied Chemistry, Kawasaki, Kanagawa (Japan)
- 2. Rigaku Corporation, X-ray Instrumental Division, Akishima, Tokyo (Japan)
- 3. Meiji University, School of Science and Technology, Department of Applied Chemistry, Kawasaki, Kanagawa (Japan)
Description
Montmorillonite in the clay reference material was determined by the Rietveld refinement with transmission method using laboratorial X-ray diffractometer. Quantitative analysis of clay minerals using X-ray diffractometry was difficult due to a characteristic of preferred orientation toward to [00ι] direction. The preferred orientation of montmorillonite was suppressed using the transmission method by preparing the measurement specimen using a glass capillary without pressurization filling. In the Rietveld refinement, an amorphous phase is determined using an internal standard material with high crystallinity. Therefore, corundum was added to the clay reference material as an internal standard material for determination of amorphous phase. The quantitative values of montmorillonite, quartz, and amorphous phase in the clay reference material were 28.1±0.4, 1.1±0.6, and 70.8±1.4 mass% respectively. The quantitative value of quartz showed good agreement with result of standard addition method (1.09±0.02 mass%). (author)
Abstract (Japanese)
日本粘土学会が頒布している JCSS-3101 参考粘土試料に含まれているモンモリロナイトを,実験室系のX線回折装置による透過法測定結果を用いた Rietveld 解析により定量した.X 線回折法による粘土鉱物の定量分析の課題である選択配向を,試料の加圧充填を必要としない透過法測定により解決した.標準試料を必要としないパターンフィッティング法の1つである Rietveld 解析を用いて,JCSS-3101 参考粘土試料に内標準物質としてコランダムを添加することで結晶相と非晶質を定量した.モンモリロナイト,石英,非晶質の定量値はそれぞれ,28.1±0.4, 1.1±0.6, 70.8±1.4 mass%となった.石英の定量値は,標準添加法による定量値 (1.09±0.02 mass%)と近い値が得られた.(著者)Additional details
Additional titles
- Original title (Japanese)
- Rietveld解析による参考粘土試料中モンモリロナイトと非晶質の定量法の検討
Publishing Information
- Journal Title
- X-sen Bunseki No Shinpo
- Journal Volume
- 50
- Series
- 雑誌名:X線分析の進歩
- Journal Page Range
- p. 223-231
- ISSN
- 0911-7806
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 54093370
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- AMORPHOUS STATE; BENTONITE; CALCIUM CARBONATES; CHEMICAL COMPOSITION; CRYSTAL STRUCTURE; GRAIN ORIENTATION; LATTICE PARAMETERS; MONTMORILLONITE; QUARTZ; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CARBON COMPOUNDS; CARBONATES; CLAYS; COHERENT SCATTERING; DIFFRACTION; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MATERIALS; MICROSTRUCTURE; MINERALS; ORIENTATION; OXIDE MINERALS; OXYGEN COMPOUNDS; SCATTERING; SILICATE MINERALS
Optional Information
- Notes
- 32 refs., 8 figs., 2 tabs.