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Search found 4 matches |
Author | Message |
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Topic: Conditions where pyrite/pyritohedra are formed | |
LDMarks Replies: 16 Views: 12170 |
Forum: Minerals and Mineralogy Posted: Oct 06, 2021 22:00 Subject: Re: Conditions where pyrite/pyritohedra are formed |
Some useful information in these responses, thanks everyone.
To clarify a couple of points [1] as someone who has worked on this a bit, it is very possible to have a population of different crystal ... |
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Topic: Conditions where pyrite/pyritohedra are formed | |
LDMarks Replies: 16 Views: 12170 |
Forum: Minerals and Mineralogy Posted: Sep 30, 2021 14:26 Subject: Conditions where pyrite/pyritohedra are formed |
I am looking for information about the conditions under which pyrite forms pyritohedral or icosahedral single crystals. The first is when {210} facets are favored; the second is when both {210} and {1 ... | |
Topic: About cyclic twinning - (5) | |
LDMarks Replies: 157 Views: 279141 |
Forum: Featured Columns of FMF Posted: Aug 06, 2021 13:56 Subject: Re: About cyclic twinning - (5) |
If grown by, for instance, vapor deposition then every fcc metal can produce fivelings and also icosahedra -- not as naturally formed minerals though. From Goldschmidt's atlas I found naturally occuri ... | |
Topic: About cyclic twinning - (5) | |
LDMarks Replies: 157 Views: 279141 |
Forum: Featured Columns of FMF Posted: Aug 05, 2021 11:10 Subject: Re: About cyclic twinning - (5) |
I am looking for nice examples of fivelings, either images or references earlier than 1960 (in particular any in the 1800's). Any links very much appreciated. | |
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