Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Report of the Association International Pour l'Etude des Argiles (AIPEA) nomenclature committee for 2001; order, disorder and crystallinity in phyllosilicates and the use of the "crystallinity index"

Stephen Guggenheim, Derek C. Bain, Faiza Bergaya, Maria F. Brigatti, Victor A. Drits, Dennis D. Eberl, Milton L. L. Formoso, Emilio Galan, Richard J. Merriman, Donald R. Peacor, Helge Stanjek and Takashi Watanabe
Report of the Association International Pour l'Etude des Argiles (AIPEA) nomenclature committee for 2001; order, disorder and crystallinity in phyllosilicates and the use of the "crystallinity index"
Clays and Clay Minerals (June 2002) 50 (3): 406-409

Abstract

The Nomenclature Committee of AIPEA suggests that the term 'crystallinity index' should not be used, because any deviations from a perfect structure have specific diffraction effects, which may not be measurable by documenting variations of width of a single peak. Instead, it is suggested that the terms 'Hinckley Index', 'Kubler Index' and 'Arkai Index' must be used for kaolinite, illite and chlorite respectively. Due to the existence of a continuum between amorphous and crystalline phases it is necessary to clarify the term 'amorphous', using a description of the diffraction or other properties that suggest the phase is amorphous. The sample preparation techniques and experimental conditions must be reported. Adjectival modifiers may be used to describe amorphous. It is appropriate also to refer to an 'X-ray amorphous' or 'electron amorphous' state if this is determined by XRD or electron diffraction respectively.


ISSN: 0009-8604
EISSN: 1552-8367
Coden: CLCMAB
Serial Title: Clays and Clay Minerals
Serial Volume: 50
Serial Issue: 3
Title: Report of the Association International Pour l'Etude des Argiles (AIPEA) nomenclature committee for 2001; order, disorder and crystallinity in phyllosilicates and the use of the "crystallinity index"
Affiliation: University of Illinois at Chicago, Department of Earth and Environmental Sciences, Chicago, IL, United States
Pages: 406-409
Published: 200206
Text Language: English
Publisher: Clay Minerals Society, Clarkson, NY, United States
References: 38
Accession Number: 2002-064841
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Secondary Affiliation: Macaulay Land Use Research Institute, GBR, United KingdomUniversity of Orleans, FRA, FranceModena and Reggio Emilia University, ITA, ItalyRussian Academy of Sciences, RUS, Russian FederationU. S. Geological Survey, USA, United StatesUniversidade Federal do Rio Grande do Sul, BRA, BrazilUniversity of Seville, ESP, SpainBritish Geological Survey, GBR, United KingdomUniversity of Michigan, USA, United StatesTechnische Universitaet Munchen, DEU, Federal Republic of GermanyJoetsu University of Education, JPN, Japan
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200220
Program Name: USGSOPNon-USGS publications with USGS authors
Close Modal

or Create an Account

Close Modal
Close Modal