The Color Causing Mechanism And Influencing Factors Of Lavender Feicui In Myanmar

Lavender feicui is divided into three series: pink purple feicui series, purple feicui series, and blue purple feicui series.Lavender feicui in this paper focused onphysical properties,texture and structure,mineralogical and chemical compositions ofminerals as well as crystalline structure.Commonly Natural lavender feicui is drusy structures and brecciated texture. Itspurple phenocrysts has zonal structure, formed from static recrystallization, dynamicmetamorphism is not obvious. Some of samples have green parts, the texture of whichis fibrous and radial. It illustrates that purple jadeite formed in earlier period andcrystallized as early as contemporaneous white jadeite, or possibly a little later.Through infrared spectroscopy,powder diffraction experiments, it shows that themajor mineral composition of lavender feicui is jadeite, and other mineral contentless cannot be reflected by spectrum owing to low content. Hence the isomorphism injadeite causes the color of lavender feicui.Through electron prove microanalysis （EPMA） and LA-ICP-MS,the results showthat purple feicui has a high content of Mn,Fe. Blue-purple feicui contains moreFe,Ti than pink-purple and purple feicui. And V,Co,Ba element in the blue-violet feicuimay impact on value and saturation. Pink-purple feicui has a certain content of Mn butless Fe than purple and blue-purple feicui.And find celsian in the phenocrysts.Thelavender feicui are characterized by MREE-depleted,both of HREE and LREE-enrichedpattern,and the content of LREE is more than HREE.Except blue feicui with asignificantly positive Eu,other series of lavender feicui with nagtive Eu.Except purplefeicui with a significantly positive Ce,other series of lavender feicui are nagtive in Ce.Through UV spectrum of heating contrast experiments, combined with traceelements test, the purple feicui absorption spectral feature is in580nm，thespectrogram shows that purple feicui is mainly because Mn³⁺,Fe²⁺ also has certainimpact color of purple. Pink purple feicui contains certain amount of of Mn³⁺, butvery little Fe²⁺.Blue purple feicui, Ti4+and Fe²⁺ induced color are reason forcolor,and Mn³⁺ may also have a impact of color.