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RayStraw
Joined: 21 Jul 2018
Posts: 47
Location: Bloomington Illinois
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 Posted: Mar 04, 2020 12:29 Post subject: Malachite twinning |
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Someone claimed that all malachite is twinned.
Does anyone know of any discussion or papers to this effect?
Best,
Ray |
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Birdbrain59
Joined: 07 Feb 2019
Posts: 21
Location: Oregon
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| Posted: Mar 04, 2020 18:09 Post subject: Re: Malachite twinning |
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| Thank you Ray for this post. I did not know what twinning was now I do. Always learning |
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Sante Celiberti
Joined: 04 Oct 2019
Posts: 699
Location: Tuscany
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| Posted: Mar 04, 2020 18:48 Post subject: Re: Malachite twinning |
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| RayStraw wrote: | Someone claimed that all malachite is twinned.
Does anyone know of any discussion or papers to this effect?
Best,
Ray |
Never heard. I heard that all malachite is pseudomorph, although this claim isn't correct.
Best regards. |
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John Betts
Joined: 07 Jun 2012
Posts: 209
Location: New York City
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| Posted: Mar 05, 2020 09:58 Post subject: Re: Malachite twinning |
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Any good mineralogical reference lists twinning as common on {100} and {201}. See Dana's Mineralogy or the Mineral Handbook. This forum makes it difficult to post links, but you can search for the latter and find it online.
_________________
John Betts |
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Johan Kjellman
Joined: 10 Jan 2014
Posts: 19
Location: Uppsala
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| Posted: Mar 08, 2020 06:27 Post subject: Re: Malachite twinning |
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| RayStraw wrote: | Someone claimed that all malachite is twinned.
Does anyone know of any discussion or papers to this effect?
Best,
Ray |
Order-disorder twinning of malachite
Makovicky, Emil (Institute of Geoscience and Natural Resources Management, University of Copenhagen, Østervoldgade 10, Copenhagen; 1350, Denmark); Merlino, Stefano Source: Canadian Mineralogist, v 57, n 4, p 475-488, 2019 |
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RayStraw
Joined: 21 Jul 2018
Posts: 47
Location: Bloomington Illinois
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| Posted: Mar 08, 2020 06:50 Post subject: Re: Malachite twinning |
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Thank you.
I bought and downloaded the paper.
Ray |
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