First Ternary Sodium Phosphidotantalate

  • Author:
  • Published: 07 December 2020
  • Copyright: Wiley-VCH GmbH
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: First Ternary Sodium Phosphidotantalate

Phosphide-based lithium-ion conductors with potential uses in batteries have been well studied. In contrast, little is known about the corresponding sodium phosphide compounds and their sodium-ion conductivity.

Thomas F. Fässler, Technical University of Munich, Garching, Germany, and colleagues have synthesized the first ternary Na–Ta–P compound, the sodium phosphidotantalate Na7TaP4. The team originally wanted to prepare a sodium analogue of the lithium-ion conductor Li9AlP4 by reacting the elements Na, Al, and P in tantalum ampules. Instead, they obtained Na7TaP4. They then developed a more efficient synthesis of this new compound, where Na7TaP4 is prepared from the elements via ball milling and subsequent annealing at up to up to 973 K (ca. 700 °C).

Na7TaP4 was characterized using X-ray diffraction. The compound crystallizes in a new structure type in the monoclinic space group P21/c. The structure (pictured) contains isolated [TaP4]7– tetrahedra—a rarely found structural motif—surrounded by sodium atoms.



Article Views: 1340

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH