Science. 1986 Oct 31;234(4776):590-2. doi: 10.1126/science.234.4776.590.
A newly studied interplanetary dust particle contains a unique set of minerals that closely resembles assemblages in the refractory, calcium- and aluminum-rich inclusions in carbonaceous chondrite meteorites. The set of minerals includes diopside, magnesium- aluminum spinel, anorthite, perovskite, and fassaite. Only fassaite has previously been identified in interplanetary dust particles. Diopside and spinel occur in complex symplectic intergrowths that may have formed by a reaction between condensed melilite and the solar nebula gas. The particle represents a new link between interplanetary dust particles and carbonaceous chondrites; however, the compositions of its two most abundant refractory phases, diopside and spinel, differ in detail from corresponding minerals in calcium- and aluminum-rich inclusions.
一颗新研究的行星际尘埃颗粒含有一组独特的矿物，与碳质球粒陨石中难熔、富钙和富铝包裹体的组合非常相似。这组矿物包括透辉石、镁铝尖晶石、钙长石、钙钛矿和钙钛榴石。只有钙钛榴石以前在行星际尘埃颗粒中被发现过。透辉石和尖晶石以复杂的共生形式出现，可能是由凝聚的辉石和太阳星云气体之间的反应形成的。该颗粒代表了行星际尘埃颗粒和碳质球粒陨石之间的新联系；然而，其两种最丰富的难熔相，透辉石和尖晶石，在细节上与富钙和富铝包裹体中的对应矿物不同。
