Talk:Pyrite group

Period after list?

   I have some sympathy for with the colleague who put a period after the last item of my list. I guess my best short argument is that almost every reader has forgotten, by the end of the list, that the series of noun phrases was preceded by what kinda looks like the beginning of a sentence.
   To make that grammar-hostile argument a little more palatable, i suggest a model of English grammar that is a little more baroque than anything i've ever been formally taught. To wit, "Examples include:" arguably is waiting for a period somewhere after it, but clearly

Examples include everything on the following list.

is not, and i suggest that

Examples include everything on the following list:

either is not waiting for a period, or errs in using a colon where a period would suffice. I think i'd be hard to push away from the position that the use of a colon also signals the end of a sentence, and that the difference between a period and a colon is that the colon indicates that words, like "everything on the following list" (with or without a period) are omitted but should be understood. (Or will be understood by any fool or genius who isn't asking themself "WTF does a stack of two dots mean?") I dunno whether the MoS says something like that, but if that's what it takes to keep the period off the end of that list, i'll make the same argument on the appropriate MoS talk page.
--Jerzy•t 21:14 & 21:21, 5 August 2013 (UTC)

Check the article history. The period was there when the article was started. Vsmith (talk) 21:30, 5 August 2013 (UTC)

   First, let me thank and congratulate you for achieving a positive contribution as you butted into a dispute you weren't involved in! It was indeed there when i started the article. It took some searching to remind myself how i decided to put pyrrhotite in the pyrite group (a mistake, by the way) and see what sentence in that article i'd stripped down for my bullet point, perhaps leaving a period in place. Long story short, it's not a pyrite, FeS is not magnetic, and the lower the iron-content of a pyrrhotite sample, the more magnetic. In a line, my concentration was shot, and an extra period was the least of my sins. Thanks again for your generosity.
--Jerzy•t 01:52, 6 August 2013 (UTC)

what is a pyrite?

does a pyrite have to have only a lone s or could there be a radical like SO4 or something? Justanacc (talk) 16:09, 30 December 2016 (UTC)