boron silicate 中文意思是什麼
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In order to understand this variety of colour, you will have to brush up your knowledge of gemmology a little : tourmalines are mixed crystals of aluminium boron silicate with a complex and changing composition
是極為復雜的硼鋁硅酸鹽，其中可含一種或數種以下成分：鎂鈉鋰鐵鉀或其他金屬。 -
The tourmaline is a kind of boron and silicate mineral, calling " the green imperial or royal seal " of the gems, there are its colors in many, the crystallization has nothing in common with each other, the crystal structure has tripartite crystal, six arrises body, post form body and one bunch of needles form fibrous respectively, the hardness of the tourmaline is generally about 7. 3 - 9. 6, the relative density is 3. 03 - 3. 25
式中r代表金屬陽離子，當r為mg2 fe2或li al3時，分別構成鎂電氣石黑電氣石和鋰電氣石三個端員礦物種。電氣石晶體呈近三角形的柱狀，兩端晶形不同，柱面具縱紋，常呈柱狀針狀放射狀和塊狀集合體。 -
Non - alkali cloth made form aluminum boron silicate glass contains less than 0. 8 % of alkali metal oxide
無堿布採用鋁硼硅酸鹽玻璃成份，其堿金屬氧化物含量不大於0 . 8 % 。 -
You may well ask how that is possible. tourmalines are mixed crystals of aluminium boron silicate with a complex and changing composition. it s a rather complex mineral group
是極為復雜的硼鋁硅酸鹽，其中可含一種或數種以下成分：鎂鈉鋰鐵鉀或其他金屬。
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