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barbertonite : ウィキペディア英語版 | barbertonite
Barbertonite is a magnesium chromium carbonate mineral with formula of (). It is polymorphous with the mineral stichtite and, along with stichtite, is an alteration product of chromite in serpentinite. Barbertonite has a close association with stichtite, chromite, and antigorite (Taylor et al., 1973). A study published in 2011 presented evidence that barbertonite is a polytype of stichite and should be discredited as a mineral species. == Barbertonite family group == Barbertonite is a member of the hexagonal Sjogrenite group along with manasseite () and sjogrenite () (Palache et al., 2003). The rhombohedral hydrotalcite group consists of the minerals: stichtite (), hydrotalcite (), and pyroaurite (). These two isostructural groups are polymorphous in relation to each other (Palache et al., 1944).
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