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User:Straal

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Straal is a member of Mensa International.


Normally he doesn't add new pages, but tidies up or enhances existing ones he finds lying around...


You can help improve the articles listed below! This list updates frequently, so check back here for more tasks to try. (See Wikipedia:Maintenance or the Task Center for further information.)

Help counter systemic bias by creating new articles on important women.

Help improve popular pages, especially those of low quality.

Also work needed on :


Special pages (maintenance) Information
Broken redirects
Dead-end pages Dead-end pages
Dormant pages Forgotten articles
Double redirects Double redirects
Lonely pages Orphaned articles
Long pages
New pages New pages patrol
New pages feed Page curation
Protected pages Protection policy
Short pages
Uncategorized pages Categorization
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Most interwiki links
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Most-wanted articles
See also: Maintenance departments
Pyromorphite
Pyromorphite is a mineral species composed of lead chlorophosphate: Pb5(PO4)3Cl, sometimes occurring in sufficient abundance to be mined as an ore of lead. First distinguished chemically by Martin Heinrich Klaproth in 1784, it was named pyromorphite by Johann Friedrich Ludwig Hausmann in 1813. It is usually green, yellow or brown in color, with a resinous lustre. Crystals are common and have the form of a hexagonal prism terminated by the basal planes, sometimes combined with narrow faces of a hexagonal pyramid. Other forms include crystals with a barrel-like curvature and globular or reniform masses. Pyromorphite is part of the apatite group of minerals and bears a close resemblance physically and chemically with two other minerals, mimetite and vanadinite. This focus-stacked photograph, merged from 26 separate images, shows a sample of pyromorphite extracted from the Resuperferolitica Mine in Santa Eufemia, in the Spanish province of Córdoba. The sample measures 3.5 cm × 3.0 cm × 1.5 cm (1.38 in × 1.18 in × 0.59 in).Photograph credit: David Ifar



His contributions so far:

30 June 2010

14 July 2006

27 September 2005

17 September 2005

14 September 2005

8 September 2005

6 September 2005

2 September 2005

25 August 2005

24 August 2005

11 August 2005

25 May 2005

4 May 2005

9 April 2005

8 April 2005

7 April 2005

17 March 2005


Some signatures:
~~~|[[User_Talk:Straal|☺]] ~~~~~
Straal| 23:15, Jul 8, 2004 (UTC)

~~~
Straal

~~~~
Straal 23:15, Jul 8, 2004 (UTC)

~~~~~
23:15, Jul 8, 2004 (UTC)