(19)

(11)

EP 3 645 759 A1

(12)

(43) Date of publication: 06.05.2020 Bulletin 2020/19 (21) Application number: 18823055.1 (22) Date of filing: 26.06.2018

(51) International Patent Classification (IPC):  C22B 59/00(2006.01) C01F 11/46(2006.01) C22B 3/12(2006.01) C22B 60/00(2006.01) C01G 21/20(2006.01) (86) International application number: PCT/AU2018/000105 (87) International publication number: WO 2019/000014 (03.01.2019 Gazette 2019/01)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 27.06.2017 AU 2017902476 (71) Applicant: AUSTRALIAN NUCLEAR SCIENCE AND TECHNOLOGY ORGANISATION Lucas Heights New South Wales 2234 (AU)	(72) Inventor: GRIFFITH, Chris Woonona, NSW 2517 (AU) (74) Representative: De Clercq & Partners  Edgard Gevaertdreef 10a 9830 Sint-Martens-Latem 9830 Sint-Martens-Latem (BE)