webmaster Posted November 8, 2004 Share Posted November 8, 2004 From: J.L. Fernandez-Turiel Subject: Meaning of ppd What means (ppd) after Fe(OH)3? From: Craig Bethke Subject: Re: Meaning of ppd Jose, 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. Quote Link to comment Share on other sites More sharing options...
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