STRUCTURE REFINEMENT OF ASTROPHYLLITE

dc.contributor.author	Ma Z.
dc.contributor.author	Li G.
dc.contributor.author	Shi N.
dc.contributor.author	Zhou H.
dc.contributor.author	Ye D.
dc.contributor.author	Pushcharovsky D.Yu.
dc.date.accessioned	2021-03-06T08:43:17Z
dc.date.available	2021-03-06T08:43:17Z
dc.date.issued	2001
dc.identifier	https://elibrary.ru/item.asp?id=13917471
dc.identifier.citation	Science in China Series D, 2001, 44, 6, 508-516
dc.identifier.issn	1006-9313
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/26412
dc.description.abstract	The crystal structure of astrophyllite K2Na(Fe, Mn, Mg,□)7[Ti2(Si4O12)2\|O3](OH, F)4 has been refined. The dimensions of the triclinic unit cell are: a = 0.5359(2) nm,b = 1.1614(4) nm, c = 1.1861(4) nm, α= 113.16(2)°, β= 103.04(2)°,γ= 94.56(2)°,V = 0.6495(5) nm3, Z= 1, space group P1, R=0.057 for 5308 reflections \|Fo\|>3σ\|Fo\|. According to structural and compositional differences the monoclinic astrophyllite K2NaNa(Fe, Mn)4Mg2Ti2[Si4O12]2(OH)4(OH, F)2 and astrophyllite should be considered as two different mineral species. Astrophyllite, monoclinic astrophyllite, bafertisite and lamprophyllite contain heteropolyhedral sheets which topologically are related with Si, O sheets of mica where one or several SiO4 tetrahedra are replaced by TiO n polyhedra. Therefore this heterophyllotitanosilicate series represents a kind of functional substitution in inorganic crystals.
dc.title	STRUCTURE REFINEMENT OF ASTROPHYLLITE
dc.type	Статья

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