Metastable carbonates play important roles in geochemistry, biomineralization and serve as model systems for nonclassical theories of nucleation growth. Balcite (Ca0.5Ba0.5CO3) is a remarkable carbonate phase that isostructural with high-temperature modification calcite (CaCO3), yet can be synthesized at ambient conditions. Here, we investigate crystallization pathways the Ba–Ca–CO3–H2O system,...

We have determined the crystal structures of complexes of phosphoinositide-specific phospholipase C-delta1 from rat with calcium, barium, and lanthanum at 2.5-2.6 A resolution. Binding of these metal ions is observed in the active site of the catalytic TIM barrel and in the calcium binding region (CBR) of the C2 domain. The C2 domain of PLC-delta1 is a circularly permuted topological variant (P...

The composite powders of barium-magnesium ferrite were prepared using sol-gel auto-combustion and microwave methods. The crystal structure and the shape of nanocomposites have been compared. X-ray Diffraction (XRD), Scanning Electron Microscope (SEM) and Vibrating Sample Magnetometer (VSM) were used to investigate the structural, morphological and magnetic properties of nanopowder. The formatio...

Mössbauer spectra of powder and aligned Ba3Co2−xZnxFe24O41 samples with x=0–2.0 have been obtained and analyzed at room temperature and at T=7 K with applied magnetic fields of 0 and 60 kOe. The relationship between Mössbauer parameters and magnetic properties has been studied. The magnetocrystalline anisotropy of Ba3Co2−xZnxFe24O41 is modified from the c plane to the c axis at Zn concentration...