Talk:Mimetite

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Phosphoric acid ?

"Campylite is the name for a variety [...] containing a considerable proportion of phosphoric acid." Phosphoric acid !!?? --Stenallan (talk) 21:45, 12 February 2022 (UTC)[reply]

I suspect most of the article is copied verbatim from the 1911 Encyclopedia Britannica. It was not uncommon a century ago to express the anion fraction in rocks and minerals in terms of the corresponding acids. So in modern language, this would be a form with elevated phosphate content. The whole article needs to be updated with modern language and sources, which I will get to ... eventually. --Kent G. Budge (talk) 23:13, 12 February 2022 (UTC)[reply]

Thank you Kent G. Budge for the explanation. In some other mineral descriptions I see “contains X-oxide” which I used to read as contains element X but not meaning the proper X-oxide. ----Stenallan (talk) 14:23, 14 February 2022 (UTC)[reply]

Featured picture scheduled for POTD

Hello! This is to let editors know that File:Mimetite - Congreso-León mines, San Pedro Corralitos, Chihuahua, Mexico.jpg, a featured picture used in this article, has been selected as the English Wikipedia's picture of the day (POTD) for April 30, 2025. A preview of the POTD is displayed below and can be edited at Template:POTD/2025-04-30. For the greater benefit of readers, any potential improvements or maintenance that could benefit the quality of this article should be done before its scheduled appearance on the Main Page. If you have any concerns, please place a message at Wikipedia talk:Picture of the day. Thank you! Jay8g [V•T•E] 01:21, 28 April 2025 (UTC)[reply]

Mimetite is a lead arsenate chloride mineral (Pb₅(AsO₄)₃Cl) which forms as a secondary mineral in lead deposits, usually by the oxidation of galena and arsenopyrite. The name derives from the Greek Μιμητής (mimetes), meaning "imitator," and refers to mimetite's resemblance to the similar mineral pyromorphite. This focus-stacked photograph shows a 3 cm × 1.7 cm × 1 cm (1.18 in × 0.67 in × 0.39 in) sample of mimetite collected from the Congreso-León mines in the Mexican state of Chihuahua.

Photograph credit: Ivar Leidus

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