bunch density 中文意思是什麼

bunch density 解釋
凝塊密度
  • bunch : n 1 球，束，朵，串。2 瘤；隆起，突起；【礦物】小礦巢；【物理學】（電子）聚束。3 〈美俚〉一群，一...
  • density : n. 1. 稠密；濃厚。2. 【物理學】濃度；密度；比重。3. 愚鈍，昏庸。
  1. 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。
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