EN IS0 21068-4 EUROPEANSTANDARD NORME EUROPEENNE EUROPAISCHE NORM June 2024 ICS 81.080 English Version Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon- oxynitride and sialon - Part 4: XRD methods (IS0 21068- 4:2024) Analyse chimique des matieres premieres et des Chemische Analyse von Rohstoffen und feuerfesten produits refractaires contenant du carbure de silicium, Erzeugnissen, die Siliciumcarbid, Siliciumnitrid, du nitrure de silicium, de I'oxynitrure de silicium et du Siliciumoxinitrid und Sialon enthalten - Teil 4: XRD- sialon - Partie 4: Methodes de DRX (IS0 21068-4:2024) Verfahren (IS0 21068-4:2024) This European Standard was approved by CEN on 24 May 2024. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status ofanational standard without anyalteration.Up-to-date lists and bibliographical references concerning such national standardsmay be obtained on applicationtothe CEN-CENELEC Management Centre ortoany CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centrehasthesamestatusastheofficialversions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway. Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkiye and United Kingdom. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITEEUROPEENDENORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels @2024CEN All rights of exploitation in any form and by any means reserved Ref. No. EN IS0 21068-4:2024 E worldwide for CEN national Members EN IS0 21068-4:2024 (E) Contents Page European foreword.. 2 EN IS0 21068-4:2024 (E) European foreword This document (EN IS0 21068-4:2024) has been prepared by Technical Committee IS0/TC 33 "Refractories" in collaboration with Technical Committee CEN/TC 187 “Refractory products and materials" the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2024, and conflicting national standards shall be withdrawn at the latest by December 2024. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. Any feedback and questions on this document should be directed to the users' national standards body/national committee. A complete listing of these bodies can be found on the CEN website. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tirkiye and the United Kingdom. Endorsement notice modification. 3