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NotificationsNotify me of updates to The Crystal Structure of a New Microporous Compound Na0.45KNi2(Mg0.6Ni0.2Al0.2){(Ni0.5Al0.3Mg0.2)2[B6P6O24(OH)12]} in Connection with 1t:1t (B : P) Borophosphate Crystal Chemistry, pp. 571-602
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The Crystal Structure of a New Microporous Compound Na0.45KNi2(Mg0.6Ni0.2Al0.2){(Ni0.5Al0.3Mg0.2)2[B6P6O24(OH)12]} in Connection with 1t:1t (B : P) Borophosphate Crystal Chemistry, pp. 571-602 $100.00
Authors:  (Olga V. Yakubovich, Ian M. Steele, Natalya N. Mochenova, Olga V. Dimitrova - Moscow State Lomonosov University, Russia and others)
Abstract:
The Na0.5KNi2(Mg,Ni,Al)[(Ni,Al,Mg)2B6P6O24(OH)12] compound (a=13.410(4) Ň,
sp.gr. Pa 3 , Z=4) has been prepared by hydrothermal synthesis and its crystal structure
was found from X-ray diffraction data at 100K (R=0.0389). It is based on a mixed
anionic framework made by three level 12th membered rings of alternating sharing
oxygen vertices BO2(OH)2 and PO4 tetrahedra, and octahedra populated by Ni2+, Al3+ and
Mg2+ cations in the ratio 0.5:0.3:0.2. Framework micro pores are filled by different
cations. Thus, K+ cations are placed in the center of cavity walled by the borophosphate
ring construction of 12 tetrahedra. Clusters of three octahedra sharing faces and having
Ni-(Mg0.6Ni0.2Al0.2)-Ni composition are elongated by the 3 axis of the cubic unit cell and
are also surrounded by 12 borate and phosphate tetrahedra, but from different rings. Na+
cations in the framework interstices populate octahedral positions at the 3 axis with 45%
probability. The new crystal structure is discussed along with a parent structure type,
namely that of condensed phosphate NaM(PO3)3 (M=Zn or Mg). A tendency of
phosphates (not borate) archetypesí subsistence for the borophosphate compounds is
considered on the basis of some examples. The crystal chemical analysis of
borophosphates formed from an equal quantity of BO4 and PO4 tetrahedra and having
anionic architecture of different type and extent (starting from isolated units to 3D
frameworks) is presented in connection with the new crystal structure. 


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The Crystal Structure of a New Microporous Compound Na0.45KNi2(Mg0.6Ni0.2Al0.2){(Ni0.5Al0.3Mg0.2)2[B6P6O24(OH)12]} in Connection with 1t:1t (B : P) Borophosphate Crystal Chemistry, pp. 571-602