[Rockhounds] RE: Question, Cobaltian Calcite

[Axel Emmermann]

Hi Brett,

Spherocobaltite (or is it sphaerocobaltite) is CoCO3.
It's one of the pure ones, the "end-members", of the calcite group.

Calcite (CaCO3) 
Magnesite (MgCO3) 
Otavite (CdCO3) 
Rhodochrosite (MnCO3) 
Siderite (FeCO3) 
Smithsonite (ZnCO3) 

Have I forgotten a few?

Mangano-calcite is in between rhodochrosite and calcite, there's also
cadmian-smithsonite...

Cheers
Axel

> -----Oorspronkelijk bericht-----
> Van: rockhounds-bounces at lists.drizzle.com 
> [mailto:rockhounds-bounces at lists.drizzle.com] Namens Brett 
> Allen Johnson
> Verzonden: donderdag 31 juli 2008 23:07
> Aan: rockhounds at lists.drizzle.com
> Onderwerp: [Rockhounds] RE: Question, Cobaltian Calcite
> 
> On the subject of Cobaltian Calcite.
> What is the difference between Sphaerocobaltite and Cobaltian Calcite?
> I have googled both and got many conflicting answers. Some 
> say CoCO3, others say (Co,Ca)CO3.
> I am not sure, but I think I have both Sphaerocobaltite and 
> Cobaltian Calcite in my collection. So, I need to find out 
> what is what = so I can identify my specimens correctly. Thank, Brett
> 
> 
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