摘要
新近发现的安绿玉为利蛇纹石型岫玉,其中铁质的含量、价态及占位与玉石的颜色密切相关.黄色玉的穆斯堡尔谱中出现四组四极双峰,表明Fe^(2+)分布于M1,Fe^(3+)分布于M2、M1及T晶位,Fe^(3+)/Fe^(2+)>4,因而Fe^(3+)d-d跃迁较强,故呈黄色;绿色玉中因含一定量的斜绿泥石,其穆斯堡尔谱表现出M2、M1中均有Fe^(2+)、M2、M1及T中均有Fe^(3+),但Fe^(3+)/Fe^(2+)<1致使Fe^(3+)d-d跃遇减弱以至消失,而Fe^(2+)→Fe^(3+)荷移吸收占优势,故而主要呈现绿色.
Newly found Anlu jade belongs to lizardite-type Xiuyan jade. The content, valence state and occupation of Fe have a very close relation with color-causing. For the yellow jade, Fe occupies M1 site, while Fe2+ occupies the sites of M2, M1 and T, Fe3+/ Fe2+>4, the intensity of Fe3+d-d transition is much more than that of Fe2+→Fe3+ charge-transfer transition, so the jade shows yellow; for the green jade which consists some amount of clinochlorite, Fe3+ enters the sites of M1, M2 and T, Fe2+ enters the sites of M1, M2, nevertheless, Fe3+ / Fe2+< 1, Fe3+d-d transition comes to decrease, Fe2+→Fe3+ charge-transfer transition becomes very stronger, thus, its mix-colour mainly shows green.
出处
《火山地质与矿产》
1992年第4期71-78,共8页
Volcanology & Mineral Resources
关键词
安绿玉
穆斯堡尔谱
吸收光谱
呈色
Anlu jade, Mossbauer Spectrum, Visible absorption spectrum, Color-causing
