The system diopside-nepheline-leucite
The system diopside-nepheline-leucite
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透辉石-霞石-白榴石系统
DOI：
10.1007/bf00371033
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发表时间：
1973
影响因子：
3.5
通讯作者：
E. Lidiak
中科院分区：
文献类型：
--
作者：
Alok K. Gupta;E. Lidiak
在常压条件下，研究了霞石(Ne)-千硅石(Ks)-CaO-MgO-SiO2体系欠饱和部分的一个连接——透辉石-霞石-白闪石体系。该体系为伪三元体系，切割了橄榄石固溶体（Foss）、透辉石固溶体（Diss）、霞石固溶体（Ness）、卡耐基石固溶体（Cgss）和白晶石固溶体（Lcss）的初相体积。墨利石（Mel）以亚液相的形式出现。相图有两个四相点：1。一个在1275±5°C和di60ne8lc32，其中液体与Foss， diss和Lcss共存，对应于橄榄石（Ol）白闪石；2. 另一个在1194±5°C和di27.5 ne29.5 lc43，其中Ness， fossil和lcs3存在液体，对应于Ol-Ne italite。随着温度的降低，液体从点(1)向五相组合(3)移动，与Foss、Diss、Mel和Lcss处于平衡（1258±5℃），为典型的ol -Mel-亮晶石。从点(2)液体移动到第二个五相组合(4)，其中Foss， Mel, Ness， lcss4和液体处于平衡状态（1175±5℃），对应于Lc-Ne katungite。在1168 ~ 1100℃之间，形成了Foss+Ness+Diss+Mel+Lcss+ liquid的组合，对应于Ol-Mel-Ne白闪石。化石与液体反应后消失。在点(1)附近，它在1135±10°C时消失，而在点(2)附近，它在1060±10°C时反应出来，在加入Di-Ne附近，它在950±10°C时消失。系统中的最终组合是Mel-Ne的代表。
The system diopside-nepheline-leucite, representing a join in the undersaturated part of the system nepheline (Ne)-kalsilite (Ks)-CaO-MgO-SiO2, has been investigated at atmospheric pressure. The system is pseudoternary and cuts the primary phase volumes of forsterite solid solution (Foss), diopside solid solution (Diss), nepheline solid solution (Ness), carnegieite solid solution (Cgss), and leucite solid solution (Lcss). Melilite (Mel) occurs as a subliquidus phase. The phase diagram has two four-phase points: 1. one at 1275±5° C and Di60Ne8Lc32where liquid coexists with Foss, Dissand Lcss’, corresponding to olivine (Ol) leucitite; 2. the other at 1194±5° C and Di27.5Ne29.5Lc43where Ness, Fossand Lcsscoexist with liquid, corresponding to Ol-Ne italite. With decreasing temperature, liquid moves from point (1) to a five-phase assemblage (3) where liquid is in equilibrium with Foss, Diss, Mel and Lcss(1258±5°C), which is representative of Ol-Mel-leucitite. From point (2) liquid moves to a second five-phase assemblage (4), where Foss, Mel, Ness, Lcssand liquid are in equilibrium (1175±5°C, corresponding to a Lc-Ne katungite. The assemblage Foss+Ness+Diss+Mel+Lcss+ liquid, is reached between 1168° and 1100° C and corresponds to Ol-Mel-Ne leucitite. Fossreacts with liquid and disappears. Near the point (1) it disappears at 1135±10° C, whereas near the point (2) it reacts out at 1060±10° C. Near the join Di-Ne it disappears at 950±10° C. The final assemblage in the system is representative of Mel-Ne leucitite.