Opened 5 years ago

Closed 4 years ago

#1003 closed task (wontfix)

Should we use Dispersity instead of Polydispersity/Monodispersity?

Reported by: smk78 Owned by:
Priority: major Milestone: SasView 4.3.0
Component: SasView Keywords:
Cc: Work Package: SasView Documentation


pkienzle has discovered that IUPAC formally deprecated use of the terms polydispersity and monodispersity as long ago as 2009! They advocate the use of dispersity. See:

They further advocate the use of a 'stroke-D' symbol (Ð, unicode U+0110) for dispersity (

The question for us, therefore, is whether we should update all our documentation (and, in some cases, model parameters and GUIs)?


Change History (4)

comment:1 Changed 5 years ago by butler


I think most users still think in terms of poly and mono dispersity, so a change would mainly be for the purpose of helping disseminate/enforce a new standard. I would argue that if that is the case, we have way too much more important work that needs to get done with our very small resources to make this a priority?

As for the symbol I suspect 90+% of our users would have NO idea what that meant so as a symbol it is not very helpful, where I measure a symbol's utility in its ability to provide a recognizable short hand for the concept.

comment:2 Changed 5 years ago by butler

  • Milestone changed from SasView 4.2.0 to SasView 4.3.0

comment:3 Changed 4 years ago by smk78

There are (at the time of writing) 1608 instances of words containing the root "dispersity" across SasView and SasModels. Whilst a global search and replace could be employed, the view at Code Camp IX is that would not be a professional approach. The decision therefore is that we will not address this ticket.

comment:4 Changed 4 years ago by smk78

  • Resolution set to wontfix
  • Status changed from new to closed
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