magnetite

In silicate minerals and magnetites existed isomorph tin.

硅酸盐矿物和磁矿中都存在类质同象态锡。

Quartz, zircon, magnetite, gold are major constituents of littoral placers in Shandong province, while shell, ballstone, ilmenite, rutile being secondary.

山东省滨海砂矿以石英、锆英石、磁矿、砂金等为主,其次为贝壳、球石、钛矿、金红石等。

Apart from magnetite and almandine garnet, the skarn also contains these minerals: idocrase, actinolite, epidote, fluorite and andradite (another garnet mineral).

主要构成矿物除磁矿和铝榴石外，矽卡岩尚有其他矿物如符山石，阳起石，绿帘石，萤石及钙榴石。

Evolving process of hub dynamo which used in bicycle is presented. The performance of magnetite viz. ferrimagnetism or NdFeB is analyzed. The prospect of marketing is viewed.

摘要介绍了自行车上使用的花鼓式发电机的演变，析了所用磁石，即氧体或钕硼的性能优劣，并进行了市场前景展望。

For sinter with 25% and 50% MAC fines the iron oxides mainly consisted of hematite and magnetite, the bonding phase were mainly dicalcium silicate, glassiness, and a few amount of calcium ferrite.

配比为25%和50%的两种烧结矿中氧化物均以赤矿、磁矿为主，粘结相主要以酸钙、硅酸二钙和玻璃质为主，但酸钙数量不多。