中国科学D辑(英文版)
中國科學D輯(英文版)
중국과학D집(영문판)
SCIENCE IN CHINA（SCIENTIA SINICA）
2001年
6期
508-516
,共9页
马喆生%李国武%施倪承%周湖云%叶大年%D.YU.PUSHCHAROVSKY
馬喆生%李國武%施倪承%週湖雲%葉大年%D.YU.PUSHCHAROVSKY
마철생%리국무%시예승%주호운%협대년%D.YU.PUSHCHAROVSKY
astrophyllite%crystal structure%functional substitution
The crystal structure of astrophyllite K2Na(Fe, Mn, Mg, □)7[Ti2(Si 4O12)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, a = 113.16(2)°, b = 103.04(2) °, g = 94.56(2) °, V = 0.6495(5) nm3, Z = 1, space group P1, R=0.057 for 5308 reflections |Fo|>3s|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 TiOn polyhedra. Therefore this heterophyllotitanosilicate series represents a kind of functional substitution in inorganic crystals.
