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DOE OSTI2020

Materials Data on NaCl3 by Materials Project

NaCl3 crystallizes in the orthorhombic Pnma space group. The structure is two-dimensional and consists of two NaCl3 sheets oriented in the (1, 0, 0) direction. Na is bonded in a distorted rectangular see-saw-like geometry to four Cl atoms. There are a spread of Na–Cl bond distances ranging from 2.89–3.11 Å. There are three inequivalent Cl sites. In the first Cl site, Cl is bonded in a distorted T-shaped geometry to two equivalent Na and one Cl atom. The Cl–Cl bond length is 2.20 Å. In the second Cl site, Cl is bonded in a distorted bent 150 degrees geometry to two equivalent Na and one Cl atom. The Cl–Cl bond length is 2.44 Å. In the third Cl site, Cl is bonded in a linear geometry to two Cl atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on NaCl3 by Materials Project

NaCl3 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. Na is bonded to twelve equivalent Cl atoms to form a mixture of edge and face-sharing NaCl12 cuboctahedra. All Na–Cl bond lengths are 3.09 Å. Cl is bonded in a 4-coordinate geometry to four equivalent Na atoms.

36 MATERIALS SCIENCE↗

NASA NTRS2002

Spirochaeta Americana Sp. Nov., A new Haloalkaliphilic, Obligately Anaerobic Spirochete Isolated from Soda Mono Lake in California

A novel obligately anaerobic, mesophilic, haloalkaliphilic spirochete, strain ASpG1(sup T), was isolated from sediments of the alkaline, hypersaline Mono Lake in California, U.S.A. The Gram-negative cells are motile and spirochete-shaped with sizes of 0.2 - 0.22 X 8-15 microns. Growth was observed over the following ranges: temperature 10 C to 44 C; optimum +37 C; NaCl concentration 2 - 12 % (w/v); optimum NaCl3 % and pH 8 - 10.5; optimum pH 9.5. The novel isolate is strictly alkaliphilic, requires high concentrations of carbonate in the medium, and is capable of utilizing D-glucose, fructose, maltose, sucrose, starch, and D-mannitol. The main end products of glucose fermentation are: H2, acetate, ethanol, and formate. Strain ASpG(sup T) is resistant to kanamycin, and rifampin, but sensitive to chloramphenicol, gentamycin and tetracycline. The G+C content of its DNA is 58.5 mol%, genome size is 2.98 x l0(exp 9) Daltons, Tm of the genomic DNA is 68 +/- 2 C, and DNA-DNA hybridization with the most closely related species, Spirocheta alkalica Strain Z-7491(sup T), exhibited 48.7% homology. On the basis of its physiological and molecular properties, the isolate appears to be a novel species of the genus Spirochaeta; and the name Spirochaeta americana sp. nov., is proposed for the taxon (type strain ASpG1(sup T) = ATCC BAA-392(sup T) = DSMZ 14872(sup T)).

Hoover, Richard B.↗