镁橄榄石

ABSTRACT Color center and chromium－doped forsterite lasers were studied theoretically and experimentally in the dissertation.

本文主要对色心及掺铬镁橄榄石激光器的理论和实验进行了研究。

The study results of band structure and density of state indicate that band gaps and insulativity of a andβphases forsterite increase with increasing pressure.

带结构和态密度研究表明随着压力的增加，α和β镁橄榄石带隙增加，绝缘性增强。

Adding water in the forsterite crystal reduces the bag gap of the crystal.

水减小了镁橄榄石带隙。

The results show that magnetite is transformed into hematite, serpentine is decomposed into forsterite at lower temperature(T00℃).

实验表明，硼铁矿在氧化焙烧的过程中，低温时(00℃)矿石中的磁铁矿发生氧化反应生成亦铁矿，蛇纹石分解生成镁橄榄石。

ABSTRACT One of the new laser crystals drawing much attention in recent years is the synthetic chromium-doped forsterite, for which Cr ions...

人工掺铬镁橄榄石晶体是近年来受到重视的一种激光晶体，它能使铬离子实现新波段的激光运转。

M and 1. 12 ～1. 26μm, respectively. An equipment has been designed to make the three lasers operate. The equipment can be used in titanium sapphire and chromium－doped forsterite lasers for tuning over a larger range.

并设计了一个能利用同一装置方便地实现三种激光器的调谐运转；这一装置可以类似地应用于钛宝石激光器和掺铬镁橄榄石激光器中，实现范围更宽的可调谐激光输出。

ABSTRACT One of the new laser crystals drawing much attention in recent years is the synthetic chromium-doped forsterite, for which Cr ions can realize the laser operation in a new wavelength range reaching up to 1340 nm.

人工掺铬镁橄榄石晶体是近年来受到重视的一种激光晶体，它能使铬离子实现新波段的激光运转。

We have tested several terrestrial samples, such as Mo, Ti, Ni, ilmenite, titanite, rutile, pyrite, forsterite and melilite. We have also attempted to analyze our first meteorite sample.

我们已经测试了许多地球标本，包含了钼、钛、镍与钛铁矿、楔石、金红石、黄铁矿、镁橄榄石和方柱石，同时也尝试了我们第一个陨石的标本。

Xixia, the amount of ore contained in the Xixia King within 6.9 kilometers long, 2.1 kilometers wide region, the total ore reserves of 10 million tons, are Asia's largest open-air forsterite deposits, and with the coexistence of chromium ore.

西峡，此矿蕴含量在西峡景内长6.9公里，宽2.1公里的区域内，总矿储量达10亿吨以上，是亚洲最大的露天镁橄榄石矿床，且与铬矿共存。

These processes resulted i n the formation of peculiar dunites in the hyperbasite complexes ,development of low-sulfide horizons and hortonolite dunites in the basite-hyp erbasite layered intrusions (platinum-group metal deposits),and specific proces ses of transmagmatic sulfurization of the iron-rich igneous differentiates (Cu -Ni sulfide and Cu-Zn-Pb sulfide ores).

这些作用导致产在超基性杂岩中的特殊纯橄榄岩、基性超基性层状侵入体中的低硫层和铁镁橄榄石纯橄榄岩的形成，以及富铁火成分异岩的透岩浆硫化作用(Cu-Ni硫化物和Cu-Zn-Pb硫化物矿石)。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。