The crystal structure of Pd8As3, a synthetic analogue of stillwaterite. (June 2022)

• Record Type: Journal Article
• Authors: Karimova, Oxana V.; Mezhueva, Anna A.; Zgurskiy, Nikolay A.; Zolotarev, Andrey A.; Chareev, Dmitriy A.
• Is Part Of: Mineralogical magazine. Volume 86:Number 3(2022)
• Page Start: 492
• Page End: 499
• Publication Date: 2022-06
• Subjects: synthetic stillwaterite -- crystal structure -- pd-nets -- pnictogen-nets -- nets stacking structure; Mineralogy -- Periodicals; Mineralogy -- Great Britain -- Periodicals; 549.05
• DOI: 10.1180/mgm.2022.57
• Languages: English
• ISSNs: 0026-461X

Abstract

Abstract: The synthetic analogue of mineral stillwaterite, Pd8 As3, was synthesised and its crystal structure was solved to R1 = 0.0341 based on single crystal X-ray diffraction data. Pd8 As3 is trigonal and the space group is P $\bar{3}$ . The unit-cell parameters are a = 7.4261(4), c = 10.3097(9) Å and V = 492.38(7) Å 3 with Z = 3. The structure builds up by layers of Pd and As atoms. Pd-nets and As-nets are parallel to (110) and stack along the c axis direction. The stacking sequence is ABCDEEDCBA. The relation between structures of minerals with the common formula Pd8 T 3 ( T = As or/and Sb) are discussed. They are formed by nets of pnictogen and palladium atoms. The common feature of the structures is 3 6 topology of pnictogen nets. The differences are stacking sequences and topology of the palladium nets.