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PhotosIron Content of these Boracites

18th Feb 2020 18:38 GMTRichard Gunter Expert

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Does anyone have data on the iron content of the Boracites, associated with and often including Pyrite, from Sondershausen? The Handbook of Minerals has Ericaite occurring here but Mindat.org does not.

19th Feb 2020 05:40 GMTAlfredo Petrov Manager

Is it possible for ericaite to be green? All the ones I‘ve seen have been reddish, but, as one of my college professors used to say, color is the least reliable property for mineral identification.

I had a green boracite from Bolivia analyzed that turned out to be about (Mg0.93,Fe0.07), so just a minor amount of iron giving it its color.

19th Feb 2020 15:33 GMTRichard Gunter Expert

Hi Alfredo:

The description of Ericaite in the Handbook of Mineralogy says it can be green, along with several other colours. The presence of Pyrite inclusions along with its mention in the Handbook of Mineralogy is what prompted me to ask if  there was any extant data. Was your Bolivian Boracite associated with Pyrite?
 
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