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Topic: copper aluimiun solfate  (Read 7580 times)

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jgyiraszin

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copper aluimiun solfate
« on: August 30, 2004, 02:20:11 AM »
please help me out here!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
well i am not a chemist or know anything about chemistry but in my search i found this site.  I need an answer to this     CuAI6(PO4)4(OH)8*4H20    what color is this chemisrty make up?  I used a * before the 4H20 thier is a dot that is about in the middle of it i do not know how to get that dot so i used the * instead.

Thank you for your time
Jeremy  


what color is this?

Tetrahedrite

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Re:copper aluimiun solfate
« Reply #1 on: August 30, 2004, 02:37:22 AM »
You're in luck! This is one of my areas of study. That is the formula of the mineral turquoise, which ranges in colour from green to brilliant blue. As a guide, most secondary Cu2+ compounds are either blue or green.

Offline AWK

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Re:copper aluimiun solfate
« Reply #2 on: August 30, 2004, 04:04:49 AM »
Turquoise tends to be green if a content of iron is pretty big.

see: http://www.americana.net/tourq.html
« Last Edit: August 30, 2004, 04:11:37 AM by AWK »
AWK

Tetrahedrite

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Re:copper aluimiun solfate
« Reply #3 on: August 30, 2004, 07:58:01 PM »
Substitution in the structure of chromium will also give a green colour

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