Talk:Plagioclase

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Potential Rename[edit]

Should we rename (with appropriate redirection) this article? I think Plagioclase feldspars is more accurate because it reflects the fact that plagioclase is really a mineral group. Jon 12:37, 12 March 2006 (UTC)

No, correct term is "plagioclase", not "plagioclase feldspar". Siim 14:45, 12 March 2006 (UTC)


Article began with word "plagioclase", now it's replaced with "In geology, plagioclase". Why so? Plagioclase is a group of minerals and therefore it's not only geological term. IMHO, articles should preferentially begin with term in bold letters. Exceptions should be made only if really needed. Siim 14:51, 12 March 2006 (UTC)


Which source says that plagioclase is more properly called plagioclase feldspar? Siim 14:57, 12 March 2006 (UTC)


The extinction angle is an optical characteristic caused by albite twinning

It says to me that extinction angle is something which is caused by albite twinning :) What about biotite, pyroxenes and so on. They don't have albite twinning but they certainly have ext. angle. Siim 15:04, 12 March 2006 (UTC)

Agree - keep name as is, plus fixed ext. angle & In geology ... bits. Vsmith 23:39, 12 March 2006 (UTC)

I remember reading a WP policy recommendation a while ago that recommends WP articles start with 'In (field of endeavour), term is ...". It's a traditional encyclopaedia thing. I'll try to find the ref. Jon 11:41, 13 March 2006 (UTC)