Osmium diselenide, OsSe₂

Osmium diselenide OsSe₂ is a binary chalcogenide compound with a consistent mass fraction of osmium.

Substance identification

The formula OsSe₂ corresponds to osmium diselenide. The calculated mass fraction of Os is about 54.63%, which falls within the range of 53.56–54.93%, so the chemical composition is consistent. Scientific publications describe crystalline phases of OsSe₂, but the specific CAS and phase modification of the batch are not established.

Confirmed characteristics

• Formula: OsSe₂
• Osmium: 53.56–54.93% per TU 6-09-05-917-78
• Calculated Os content: about 54.63%
• Appearance: light gray powder
• Item number: 5162753

Applications and preparation

The material is considered in studies of chalcogenides, high pressures, structure, and electronic properties. The result depends on phase, defects, particle size, and impurities, so the general name OsSe₂ does not guarantee predefined properties.

For reproducible work, confirm the phase by XRD and determine the elemental composition by a suitable method. Heat treatment, pressing, and synthesis are carried out according to a separate protocol with atmosphere control. Weigh the sample according to the CoA. Do not transfer conditions from sulfides or tellurides: stability and heating products will differ.

What to agree before ordering

In your request, specify OsSe₂, the required phase, the acceptable range of Os and Se content, particle size distribution, and allowable impurities. Request CoA, SDS, diffractogram or XRD report, and a description of the analysis method. For surface studies, agree on specific surface area; for high-temperature work, agree on packaging, storage, and maximum allowable air exposure.

Safe handling

Prevent the formation and spread of dust. Use a fume hood, safety glasses, closed clothing, and chemically compatible gloves; respiratory protection should be selected according to the SDS and risk assessment. Heating is allowed only in controlled equipment due to potentially hazardous selenium and osmium products. Collect residues, filters, and containers as hazardous metal-containing waste.