Natural fluorite emitting yellow fluorescence under UV light

  title={Natural fluorite emitting yellow fluorescence under UV light},
  author={Aierken Sidike and Isao Kusachi and Nobuhiko Yamashita},
  journal={Physics and Chemistry of Minerals},
AbstractMany mineralogists believe that fluorite emits violet fluorescence under UV light, but a special fluorite from Japan emits yellow fluorescence under UV light. The analysis by inductively coupled plasma-mass spectrometry (ICP-MS) shows that this fluorite includes high concentrations of Dy together with various rare-earth (RE) impurities other than Pm and Eu. Photoluminescence (PL) emission and excitation spectra of the fluorite are investigated at 10, 80 and 300 K. The origin of yellow… 

Yellow fluorescence from baghdadite and synthetic Ca3(Zr,Ti)Si2O9

Baghdadite from Fuka, Okayama Prefecture, Japan shows a bright yellow fluorescence under UV (Hg 253.7 nm) excitation. The photoluminescence (PL) spectrum at 300 K consists of one large band near 580

Mineralogical Characteristics and Luminescent Properties of Natural Fluorite with Three Different Colors

Fluorite is rich in mineral resources and its gorgeous colors and excellent luminescence characteristics have attracted the attention of many scholars. In this paper, the composition, structure,

The luminescence properties of rare-earth ions in natural fluorite

For the first time, the luminescence properties of Pr3+, Nd3+ and Tm3+ and Yb3+ ions in fluorite crystal have been obtained by steady-state measurements. In addition, the luminescence spectra of

Irradiation-induced valence conversion of samarium ions in Na2SO4

Na2SO4:Sm phosphors were synthesized by heating pure sodium sulphate with a small amount of SmF3 at 950 °C. X-ray diffraction (XRD) and scanning electron microscopy (SEM) measurements show that the

Luminescence properties of Ce3+ and Eu2+ in fluorites and apatites

Luminescence properties of Ce3+ and Eu2+ in fluorites and apatites Natural samples of fluorite and apatite from granites, pegmatites, carbonatites and andesitic tuffs were investigated by steady-time

Photoluminescence properties of anthophyllite

The photoluminescence (PL) spectra, optical excitation spectra and PL decay curves of anthophyllite from Canada were obtained at 300 and 10 K. The MnO content in the sample, determined using an

X-ray Induced Luminescence Spectroscopy of Samarium Doped Barium Sulfate Prepared by Sintering Method

X-ray induced luminescence (XL) properties of phosphor materials made of samarium doped barium sulfate have been investigated. The samples were prepared by sintering method heated at 900-1250 °C for

Photoluminescence properties of gypsum

The photoluminescence (PL) properties of four gypsums from three localities, namely, Inner Mongolia (China), Turkey, and Canada, are investigated at room temperature. Under 365-nm excitation, two



Laser excited luminescence of rare earth impurities in natural and synthetic CaF2

This work explores the potential of laser excited luminescence for the study of type and concentration of rare-earth (RE) luminescence centres in CaF2. A comparison with X-ray excited luminescence is

Spectrum of Trivalent Erbium Ion in the Matrix of Calcium Fluoride

In the following article the absorption and emission spectra of CaF2:Er3+ are presented, discussed, and analyzed phenomenologically. The crystalline states are listed and identified with the free ion

Rare-earth elements, thermal history, and the colour of natural fluorites

The contents of La and of all 13 naturally occurring rare-earth elements (REEs) in samples of natural fluorites were determined by neutron activation analysis. The samples were chosen to test the

Laser-induced time-resolved luminescence as a tool for rare-earth element identification in minerals

Abstract We have determined and distinguished a number of rare-earth elements in several minerals by use of laser-induced time-resolved luminescence spectroscopy. Unlike the conventional measurement

Photoluminescence of Sm3+ Ions in MgS, CaS, SrS and BaS Phosphors

Details of emission and excitation spectra of powder phosphors were obtained at various temperatures between 6 K and room temperature. The emission spectra consist of six groups of emission lines

Selective laser excitation of charge compensated sites in CaF2:Er3+

A technique of selective laser excitation has been developed and used to study the optical spectrum of the charge compensated sites in CaF2:Er3+. The technique allows the unambiguous interpretation


Measurements are reported of absorption, emission, and activation spectra in CaF/sub 2/: Sm/sup 2+/, and also of fluorescence lifetime. A revised level scheme is proposed. Observations of optical