BS: Atacamite

Subject: BS: Atacamite
From: HuwG
Date: 16 Mar 06 - 04:16 PM

Check Rutley's or Haynes's.

Subject: RE: BS: Atacamite
From: Peace
Date: 16 Mar 06 - 04:20 PM

Picture of atacamite here.

Let me know if you get crap for this thread.

Subject: RE: BS: Atacamite
From: The Fooles Troupe
Date: 16 Mar 06 - 07:10 PM

I'll give you 2/6!

Subject: RE: BS: Atacamite
From: Ebbie
Date: 16 Mar 06 - 07:14 PM

OK, is it the blue or the black?

Subject: RE: BS: Atacamite
From: Peace
Date: 16 Mar 06 - 07:15 PM

Yes, it is.

Subject: RE: BS: Atacamite
From: Alba
Date: 16 Mar 06 - 07:20 PM

I always thought Atacamite was Green! Isn't it formed by Copper minerals or something..oh heck what do I know..lol

Jude

Subject: RE: BS: Atacamite
From: Peace
Date: 16 Mar 06 - 07:53 PM

PHYSICAL CHARACTERISTICS:

Color is dark green.

From here.

Subject: RE: BS: Atacamite
From: mack/misophist
Date: 16 Mar 06 - 08:01 PM

Pretty but too soft to bother cutting.

Subject: RE: BS: Atacamite
From: Bee-dubya-ell
Date: 16 Mar 06 - 11:15 PM

HuwG, since Peace wanted to know if you get crap for this thread, here ya go:


CRAP - CRAP - CRAP - CRAP - CRAP - CRAP


Now you can tell him you did.

Subject: RE: BS: Atacamite
From: HuwG
Date: 17 Mar 06 - 06:34 AM

Well done all.

Transcribed from "Rutley's Elements of Mineralogy", 26th Edition, ed. H. H. Read FRS:

ACTINOLITE, Remolinite

Comp: Basic chloride of copper, Cu₂(OH)₃Cl; copper, 59.4 per cent.
Crystal System: Orthorhombic.
Common Form: Prismatic, crystals not common.
Colour: Bright deep green to blackish green.
Streak: Apple green
Lustre: Adamantine to vitreous; translucent to subtranslucent.
Hardness: 3 to 3.5.
Specific Gravity: 3.76

Tests: Heated in closed tube, gives off water and forms a grey sublimate; easily soluble in acids; on charcoal, fuses in time to metallic copper, colouring the flame azure-blue (chloride) and forming a brownish and greyish-white deposit on the charcoal which volatizes in the reducing flame, again giving an azure-blue colouration.

Occurrence: Occurs in the zone of weathering in some copper lodes, especially when this weathering has been effected under desert conditions; occurs at Botallack Mine, St. Just, Cornwall; Los Remolinos and the Atacama Desert, South America; and Burra Mine, South Australia.

Subject: RE: BS: Atacamite
From: Gurney
Date: 17 Mar 06 - 08:10 PM

Never seen it before. However, I have heard about atapulgite.


Our cats crap in it.