Phase Diagram of BiMnO3: High Pressure Necessary?

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Discussion Overview

The discussion revolves around the synthesis conditions of bismuth manganate (BiMnO3), specifically whether high pressure is necessary for its formation. Participants explore the implications of different synthesis methods, including sol-gel and solid-state reactions, and the current understanding of its phase diagram.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants assert that BiMnO3 must be synthesized under high pressure conditions, as indicated by certain research findings.
  • Others note that there are instances where BiMnO3 has been synthesized at normal pressure, suggesting that high pressure may not be strictly necessary.
  • A participant mentions that the phase diagram of BiMnO3 is currently unknown, indicating that this is an open research question.
  • Another participant points out that while high pressure may stabilize BiMnO3, it does not preclude the possibility of synthesizing it at normal pressure, citing diamond as an example of a high pressure modification that can be deposited under different conditions.

Areas of Agreement / Disagreement

Participants express differing views on the necessity of high pressure for synthesizing BiMnO3, with no consensus reached on the matter.

Contextual Notes

The discussion highlights the lack of a definitive phase diagram for BiMnO3 and the potential variability in synthesis methods, which may depend on specific experimental conditions not fully detailed in the literature.

fahmi amin
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HELLO everyone..

i have read some journals and some researchers (not all but most of them) said that bismuth manganate MUST be synthesized in high pressure conditions. in other words, not in room temperature/pressure. it that true? because some of researchers also synthesized that BiMnO3 in normal pressure (i just assumed it as normal pressure@not high pressure because they are not mentioned it in their journals) and use a solgel or solid state rxn method in their BiMnO3 researchs.

which one is ok?
 
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Please get into the habit of citing your sources when posting here, especially when you are using these external sources as the basis of your post and question.

Zz.
 
ok.. I'm sorry pal
 
If you search on "Phase diagram BiMnO3" - you will find that high pressure will stabilize BiMnO3, but that the phase diagram is currently unknown.

Thus your question appears to be an open research question.
 
Even if that compound wouldn't be the most stable modification at normal pressure does not exclude the possibility that it can be synthesized at normal pressure. E.g. diamond can be deposited by CVD alltough it is a high pressure modification.
 

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