Genetic aspects of borophosphate crystal chemistryстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 31 декабря 2013 г.
Аннотация:The borophosphate family incorporates compounds
with crystal structures ranging from densely packed
to microporous.We have synthesized several transition metal
borophosphates with alkali-metal cations and determined
their crystal structures using single-crystal X-ray diffraction
at 100 K. Crystal chemical interpretations of studied phases
in correlation with literature data has allowed us to reveal
some new features in title group of compounds. One among
them presents a tendency of subsistence of phosphate archetypes
for borophosphate phases. The borato-phosphate
mineral seamanite, Mn3(OH)2[B(OH)4][PO4] has a synthetic
phosphate analogue, Na2Fe3(OH)2[PO4][PO4]. We
found a novel structural type of cubic microporous borophosphates
that realizes in the framework of two compositions:
KNi5[P6B6O23(OH)13] (an ordered phase) and
Na0.45K(Mg,Ni,Al)Ni2(Ni,Al,Mg2)2[P6B6O24(OH)12] (a disordered
phase having isomorphous and vacancy defects).
We have shown that these borophosphates are topologically
related to the cyclophosphates Cs3M3(PO3)12 (M ¼ V
or In) and NaM(PO3)3 (M ¼ Zn or Mg) as parent structures.
A zeolite-type material “CZP” – Na[Zn(PO4)](H2O)
is also known as archetype for some borophosphates,
namely, Aþ
xM(H2O)2(BP2O8)(H2O), (A ¼ Na, K, Ca, and
M ¼ Zn, Co, Ni, Fe, Mn, Cd, Sc, In). In connection with
compounds having general formula Aþ{M3þ[BP2O8(OH)]}
(A: K, NH4, Rb Cs; octahedral position M: Al, Ga, Fe, Sc,
In) we showed that the polymorphism of the [BP2O8(OH)]4
anion has a morphotropic nature and is related to substitutions
both in the cationic part of the structure and in the
octahedral position of mixed anionic framework