The New High‐Pressure Sodium Tetraborate HP‐Na 2 B 4 O 7 | Zendy

Neumair Stephanie C. | Zendy; Sohr Gerhard | Zendy; Vanicek Stefan | Zendy; Wurst Klaus | Zendy; Kaindl Reinhard | Zendy; Huppertz Hubert | Zendy

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The New High‐Pressure Sodium Tetraborate HP‐Na 2 B 4 O 7

Author(s) -

Neumair Stephanie C.,

Sohr Gerhard,

Vanicek Stefan,

Wurst Klaus,

Kaindl Reinhard,

Huppertz Hubert

Publication year - 2012

Publication title -

zeitschrift für anorganische und allgemeine chemie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.354

H-Index - 66

eISSN - 1521-3749

pISSN - 0044-2313

DOI - 10.1002/zaac.201100363

Subject(s) - trigonal crystal system , crystallography , sodium , crystal structure , high pressure , chemistry , structure type , materials science , analytical chemistry (journal) , physics , thermodynamics , metallurgy , chromatography

The new polymorph of sodium tetraborate HP‐Na 2 B 4 O 7 was synthesized under high‐pressure / high‐temperature conditions of 6 GPa and 1000 °C in a multianvil apparatus with a Walker‐type module. HP‐Na 2 B 4 O 7 crystallizes with nine formula units per cell in the trigonal chiral space groups P 3 2 21 or P 3 1 21 . The parameters are a = 765.5(2), c = 2142.3(4) pm, V = 1.0872(3) nm 3 , R 1 = 0.0581, and wR 2 = 0.0809 (all data). The crystal structure of HP‐Na 2 B 4 O 7 is built up from interconnected “sechser” rings of alternating corner‐sharing BO 3 and BO 4 groups.

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