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Posted by Rock Currier  
Rock Currier May 26, 2009 05:51AM
Construction site sign5

Click here for a list of articles that are not under construction but have had at least their first drafts finished.

This article is a place holder and needs someone to take it in hand and finish the first draft. If you would like to take this article in hand, leave a reply message below or contact Rock Currier via private message by clicking on the PM button next to my name at the top of the article.

Click here to view Best Minerals A and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?

Below are some preliminary notes I have made about Arsenogorceixite. This entry and thread has been made as a place holder for information that you will hopefully contribute about Arsenogorceixite. It should be in no way be thought of as a claim I have staked out to write about this mineral, and in fact is an invitation for someone to step forward and create the article about this mineral. If you are so inclined and have questions about the format that such an article should have, go the The welcome topic at the top of the Best Minerals forum and read what has been posted there. Also take a look at some of the more mature articles that have already been written like Rhodochrosite, Adamite, Millerite etc. You will need also to pick out other images of Arsenogorceixite that will go into the article.

BaAl3<(OH)5|(AsO4)2> · H2O Trigonal
Arsenogorceixite, Clara Mine, Oberwolfach, Wolfach, Baden-Württemberg, Germany FOV 3cm

ArsenogorceixiteGermanyBaden-Württemberg, Black Forest, Wolfach, Oberwolfach, Rankach valley, Clara Mine

*Arsenogorceixite Rare species collections.
Schwarzwald, Clara Mine. “The mineral is an oxidation product occurring as tabular crystals flattened (0001), as pseudo-octahedral crystals showing {1011} and {0001}, and as spherulitic aggregates of radiating crystals. Maximum crystal size is 0.1-0.2 mm. Color variable from white to yellow, also bluish or colorless. Vitreous luster, no cleavage, conchoidal fracture…The mineral was described previously as sulfate-free weilerite. …The ratio of As:P is 74.26, which is less As than is required if Scott’s (Am. Mineral.,72, 178-187, 1987) IMA-approved nomenclature for the alunite-jarosite family is followed. Although the authors recognize the difficulty and have had the new name approved by the CNMMN, either the new name or the nomenclature system is invalid. …Arsenogorceixite is not the sole example of contradictory approved names for the alunite-jarosite members.”1 There are more of these nomenclature problems than most collectors know or even want to know about.
1 American Mineralogist, Vol. 81, p. 249, 1996.

Click here to view Best Minerals A and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

Rock Currier
Crystals not pistols.

Edited 2 time(s). Last edit at 12/27/2012 08:23AM by Rock Currier.
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