Jump to content
Geochemist's Workbench Support Forum

[OLD] Meaning of PPD


Recommended Posts

From: J.L. Fernandez-Turiel

Subject: Meaning of ppd

What means (ppd) after Fe(OH)3?


From: Craig Bethke

Subject: Re: Meaning of ppd


I've always assumed it meant "precipitated".

From: Criscenti, Louise J

Subject: Re: Meaning of ppd

I've always thought that too - but I think it also implies amorphous or nanocrystalline (hydrous ferric oxide).


From: Mark Logsdon

Subject: Re: Meaning of ppd

My understanding is that it refers to a specific set of data (traceable through the reference string) for "HFO" precipitates for which the underlying thermo data were derived. It probably is the case that the

physical materials that are traceable to source were, as Louise states, X-ray amorphous or nanocrystalline, but could also have included some mixture of different states or even compositions.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...