最近,steinhardite[接受](http://wwwphy.princeton.edu/ ~ steinh / steinhardtite.html)作为一种新的矿产国际矿物学的协会。它本身是一个有趣的故事。有一篇有趣的文章(《新科学家》)(http://www.newscientist.com/article/mg22329860.300-quasicrystal-quest-the-unreal-rock-that-nature-made.html),但这是paywalled。的公式steinhardite美元Al_ {63} Cu_ {24} Fe_ {13} $。这是一件准晶体,至少部分的混合铝没有氧气,我理解它。批评者之一(在本文引用)>…立即宣布样品的可能性被自然为“不可能”。他的担忧并非完美的程度,但是相反,cupalite令人困惑的金属铝的存在,khatyrkite和二十面体准晶体相。金属铝为O,一个非常强大的亲和力,这样它不可能形成地球自然表面的,他认为……他修改的结论,让不可能的可能性,形成了强烈的热量和压力下存在核心地幔边界附近或在高影响的流星碰撞空间。 [1] The core/mantle boundary is obviously rife with lots of chemical interactions, but what is it exactly about the conditions that prevents aluminum from oxidizing? Is it just physical pressure or the presence of other gases? There's the obvious fact that the aluminum isn't exposed to the atmosphere, but my (limited) understanding is that oxygen is plentiful in combination with other elements like silicon. >Reference: > >1. Bindi, L. & Steinhardt, P.J. (2014) The quest for forbidden crystals. *Mineralogical Magazine, 78*(2), 467–482. [[DOI]](http://dx.doi.org/10.1180/minmag.2014.078.2.15) [[PDF]](http://minmag.geoscienceworld.org/content/78/2/467.full.pdf) (seems to be freely available)