公开(公告)号：US4240834A

公开(公告)日：1980-12-23

申请号：US75719

申请日：1979-09-14

申请人： Hisashi Machida ,  Yoichiro Yoshihara

发明人： Hisashi Machida ,  Yoichiro Yoshihara

IPC分类号： C30B9/00 ,  C30B11/00 ,  C30B15/00 ,  C04B35/44

CPC分类号： C30B29/22 ,  C30B11/00 ,  C30B15/00 ,  C30B9/00

摘要： Disclosed is a synthetic single crystal for an alexandrite gem, which consists essentially of a synthetic chrysoberyl single crystal comprising aluminum oxide and beryllium oxide as the main components and chromium and vanadium as the coloring components, wherein vanadium is contained in an amount of about 0.00075 to about 2.95% by weight based on the crystal.This single crystal shows a green or bluish green color under natural light and the color is changed to red or reddish violet when the single crystal is exposed to tungsten light the single crystal of the present invention is comparable or superior to natural alexandrite produced in the Ural Mountain Region with respect to the hue and color change characteristics.

摘要翻译： 公开了一种亚历山大宝石的合成单晶，其基本上由包含氧化铝和氧化铍作为主要成分的合成氯仿单晶组成，铬和钒作为着色组分，其中钒的含量约为0.00075至 约2.95重量％，基于晶体。 这种单晶在自然光下显示绿色或蓝绿色，当单晶暴露于钨光时，颜色变为红色或红紫色，本发明的单晶与乌拉尔生产的天然亚硝酸盐相当或优于 山区相对于色调和色彩变化的特点。