Format:
Online-Ressource
ISSN:
1945-3027
Content:
Abstract: The 2111 pyribole chain sequence, where 2 signifies a double (amphibole-like) chain and 1 indicates a single (pyroxene-like) chain, has been reported from geological samples. Such material is commonly associated with slabs that contain multiples of three single chains, which we shall call “3n single-chain slabs” (where n = 1, 2, 3,…). We generated 2111 chain sequences and associated 3n single-chain slabs by heating natural chesterite crystals at ca. 1000 ºC in the laboratory as well as by their prolonged irradiation inside a 200 kV transmission electron microscope. Many of the synthesized 2111 sequences are intergrown with narrow regions containing isolated single- and double-chain material that contains, respectively, 3n single chains and n double chains. The single-chain triplets presumably formed as a result of the decomposition of isolated triple-chain slabs that were originally intergrown with the chesterite. The 2111 sequence and the 3n single-chain slabs can form, respectively, by decomposition of chesterite and triple-chain material during observation or perhaps during ion milling. Recognizing such artifacts is important when attempting to interpret geological history from the details of biopyribole structures and intergrowths.
In:
volume:89
In:
number:1
In:
year:2004
In:
pages:15-19
In:
extent:5
In:
American mineralogist, Berlin : de @Gruyter, 1916-, 89, Heft 1 (2004), 15-19 (gesamt 5), 1945-3027
Language:
English
DOI:
10.2138/am-2004-0103
URN:
urn:nbn:de:101:1-2404181738216.082457721767
URL:
https://doi.org/10.2138/am-2004-0103
URL:
https://nbn-resolving.org/urn:nbn:de:101:1-2404181738216.082457721767
URL:
https://d-nb.info/1326636723/34
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