User:Straal

From Wikipedia, the free encyclopedia

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
Uncategorized categories
Uncategorized templates
Unused categories
Unused files (images)
Unused templates
Without interwiki links
Most interwiki links
Wanted pages
Most-wanted articles
See also: Maintenance departments
Sphalerite
Sphalerite is a sulfide mineral with the chemical formula (Zn,Fe)S. It is found in a variety of deposit types, and is found in association with galena, chalcopyrite, pyrite (and other sulfides), calcite, dolomite, quartz, rhodochrosite, and fluorite. Sphalerite is an important ore of zinc, with around 95 percent of all primary zinc extracted from its ore. Due to its variable trace-element content, sphalerite is also an important source of several other metals such as cadmium, gallium, germanium and indium. The zinc in sphalerite is also used to produce brass. This sample was extracted in Creede, Colorado, and features black tetrahedral crystals of sphalerite up to 8 mm (0.31 in) in size, with minor chalcopyrite and calcite, in a 4.5 cm × 3.0 cm × 2.0 cm (1.77 in × 1.18 in × 0.79 in) matrix. This photograph was focus-stacked from 125 separate images.Photograph credit: Ivar Leidus



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)