2011
DOI: 10.1002/zaac.201100363
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The New High‐Pressure Sodium Tetraborate HP‐Na2B4O7

Abstract: 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 P3 2 21 or P3 1 21. The parameters are a = * Univ.-Prof. Dr. H. Huppertz Fax: +43 (0)512 507 2934 E-Mail: Hubert.Huppertz@uibk.ac.at [a] 81 765.5(2), c = 2142.3(4) pm, V = 1.0872(3) nm 3 , R 1 = 0.0581, and wR 2 = 0.0809 (… Show more

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Cited by 14 publications
(22 citation statements)
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“…The new compound HP-RbB 3 O 5 fulfills these expectations being isotypic to HP-KB 3 O 5 [19] and representing the fourteenth borate containing edge-sharing BO 4 tetrahedra. Furthermore, HP-RbB 3 O 5 is the fourth highpressure alkali metal borate in the recently synthesized series HP-LiB 3 O 5 [23], HP-Na 2 B 4 O 7 [24] and HP-KB 3 O 5 [19]. This paper reports about the synthesis, the single-crystal structure determination, and the vibrational spectroscopic investigations of HP-RbB 3 O 5 in comparison to the isotypic phase HP-KB 3 O 5 .…”
Section: Introductionmentioning
confidence: 99%
“…The new compound HP-RbB 3 O 5 fulfills these expectations being isotypic to HP-KB 3 O 5 [19] and representing the fourteenth borate containing edge-sharing BO 4 tetrahedra. Furthermore, HP-RbB 3 O 5 is the fourth highpressure alkali metal borate in the recently synthesized series HP-LiB 3 O 5 [23], HP-Na 2 B 4 O 7 [24] and HP-KB 3 O 5 [19]. This paper reports about the synthesis, the single-crystal structure determination, and the vibrational spectroscopic investigations of HP-RbB 3 O 5 in comparison to the isotypic phase HP-KB 3 O 5 .…”
Section: Introductionmentioning
confidence: 99%
“…These layers of BO 4 tetrahedra are interconnected by BO 3 groups. The compound HP-Na 2 B 4 O 7 contains "sechser" rings of alternating BO 3 and BO 4 units. [8] The structure type of HP-KB 3 O 5 and its isotypic phases HP-RbB 3 O 5 and HP-TlB 3 O 5 was the first to show the most important structural motifs of borate chemistry at the same time, that is, BO 3 groups as well as corner-and edgesharing BO 4 tetrahedra.…”
Section: Introductionmentioning
confidence: 99%
“…The magnetic field strength was 11.75 T corresponding to an 1 H frequency of 500.25 MHz. The deshielding values reported for 1 H refer to 1 % Si(CH 3 ) 4 in CDCl 3 . [53] The quantitative 1 H NMR experiments and the error margins were obtained from ten spin-echo experiments with different echo delays up to 0.2 ms by following the protocol and data analysis steps described in ref.…”
Section: Solid-state Nmr Measurementsmentioning
confidence: 99%
“…Access to a multianvil high-pressure device [1] enabled us to synthesize the new high-pressure alkali metal borates HPLiB 3 O 5 , [2] HP-Na 2 B 4 O 7 , [3] HP-KB 3 O 5 , [4] and HP-RbB 3 O 5 . [5] Several interesting structural motifs in these phases emphasize the highpressure route as a useful tool to establish new structure types.…”
Section: Introductionmentioning
confidence: 99%
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