Low-temperature modification of Ba(BF<sub>4</sub>)<sub>2</sub>(H<sub>2</sub>O)<sub>3</sub>

نویسندگان

چکیده

The crystal structure of the low-temperature modification Ba(BF 4 ) 2 (H O) 3 , barium bis(tetrafluoridoborate) trihydrate, was determined at 150 K. In contrast to room-temperature modification, which crystallizes in space group C 222 1 [ a = 7.1763 (6), b 18.052 (2), c 7.1631 (6) Å, V 927.93 (15) Å 300 K, Z 4; Charkin et al. (2023). J. Struct. Chem . 64 253–261], phase is monoclinic, P 7.0550 (4), 7.1706 (3), 9.4182 β 109.295 (7) o 449.68 (5) 2]. features O—H...F and O—H...O hydrogen bonding between water molecules BF − anions. One coordinating disordered over two sets sites.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Hydrophilic modification of polyethersulfone membranes by low temperature plasma-induced graft polymerization

A complete and permanent hydrophilic modification of polyethersulfone (PES) membranes is achieved by argon plasma treatment followed by polyacrylic acid (PAA) grafting in vapor phase. Both Ar plasma treatment alone and post-PAA grafting rendered a complete hydrophilicity to the PES membranes. The hydrophilicity of the membranes treated with only the Ar plasmas is not, however, permanent. In con...

متن کامل

Impact Toughness Modification of NIST Low-Energy Charpy Verification Specimens for Testing at Room Temperature

The possibility for the National Institute for Standards and Technology (NIST) to certify Charpy reference specimens for testing at room temperature (21 °C ± 1 °C) instead of −40 °C was investigated in a previous study, in which a slightly increased likelihood of specimen jamming was observed at the low-energy level (13 J to 20 J). Moreover, there is a concern that the higher impact toughness o...

متن کامل

LOW TEMPERATURE SYNTHESIS OF NANOCRYSTALLINE MgAl2O4 SPINEL VIA SUCROSE PROCESS

Abstract: Nanocrystalline MgAl2O4 spinel powder was synthesized using metal nitrates and a polymer matrix-based composed of sucrose and polyvinyl alcohol (PVA). The precursor and the calcined powders were characterized by simultaneous thermal analysis (STA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). According to XRD res...

متن کامل

LOW TEMPERATURE MOLTEN SALT SYNTHESIS OF NANO CRYSTALLINE MgAl2O4 POWDER

Abstract: composition of MgO and nano boehmite. The reactant and potassium chloride, as the reaction media, were fired at800-1000 °C at different dwell times (0.5-5 h) in the ambient atmosphere. After washing and filtration, the spinel nanopowder was characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) techniques. It was demonstrated tha...

متن کامل

On the Modification of Temperature Characteristics. I

The temperature characteristics for frequency of pulsation in isolated cloacal ends of Holothuria tubulosa are micro = 20,400 from 10 to 20 degrees , 8,000 from 20 to 30 degrees . The critical temperatures 10 degrees , 20 degrees , 30 degrees are related to thermal conditions in the environment. In sea water with doubled NaCl content micro = 8,000 from 10 to 30 degrees . This is consistent with...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: IUCrData

سال: 2023

ISSN: ['2414-3146']

DOI: https://doi.org/10.1107/s2414314623004881