close

Вход

Забыли?

вход по аккаунту

?

код для вставки
2004
Structure
D 2000
50- 007
Mg7(AsO4)2(HAsO4)4: A New Magnesium Arsenate with a very Strong Hydrogen
Bond. ? The new title compound is prepared by hydrothermal reaction of Mg(OH)2,
Sc2O3, and H3AsO4 (pH 4.5, 493 K, autoclave, 7 d). Mg7(AsO4)2(HAsO4)4 crystallizes
in the triclinic space group P1 with Z = 1 and is isotypic with Mn7(AsO4)2(HAsO4)4 or
M7(PO4)2(HPO4)4 (M: Fe, Co, Ni). The structure consists of a three-dimensional framework of edge- and corner-sharing MgO6, MgO 4(OH)2, MgO5, AsO3OH, and AsO4 polyhedra. One of the two hydrogen sites is involved in a very short hydrogen bond
(O-HиииO = 2.468 ┼). ? (KOLITSCH*, U.; BARTU, P.; Acta Crystallogr., Sect. C:
Cryst. Struct. Commun. 60 (2004) 9, i94-i96; Inst. Mineral. Kristallogr., Univ. Wien,
A-1090 Wien, Austria; Eng.) ? Schramke
Документ
Категория
Без категории
Просмотров
0
Размер файла
10 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа