scholarly journals Calcium Fluoride and Barium Fluoride Crystals in Optics

2014 ◽  
Vol 9 (4) ◽  
pp. 45-48 ◽  
Author(s):  
Daniel Hahn
Keyword(s):  
Calcium Fluoride ◽  
Barium Fluoride ◽  
Fluoride Crystals

scholarly journals Перенос электрона между разнородными лантаноидами в кристаллах BaF-=SUB=-2-=/SUB=- --- II механизмы переноса

2019 ◽  
Vol 61 (5) ◽  
pp. 888
Author(s):  
Е.А. Раджабов ◽  
В.А. Козловский
Keyword(s):  
Electron Transfer ◽  
Low Temperatures ◽  
Barium Fluoride ◽  
Absorption Bands ◽  
Thermal Electron ◽  
Thermal Transfer ◽  
Trivalent Lanthanide ◽  
Fluoride Crystals ◽  
Divalent Lanthanide ◽  
Thermal Electron Transfer

The processes of electron transfer from a divalent lanthanide acceptor (Eu, Sm, Yb) to a trivalent lanthanide donor (Nd, Sm, Dy, Tm, Yb) and reverse thermal transfer are studied in barium fluoride crystals. Electron phototransfer at room temperatures is accompanied by a counter-movement of the charge-compensating interstitial fluorine. In the process of photobleaching at low temperatures, the divalent lanthanide donor turns out to be near the interstitial fluorine, which causes its 4f-5d absorption bands to shift to the red. The magnitude of the shift increases with decreasing size of the lanthanide in the series (Nd, Sm, Dy, Tm, Yb). Detailed mechanisms of photo and thermal electron transfer between heterogeneous lanthanides in BaF2 crystals are analyzed.

Precipitation of calcium in natural calcium fluoride crystals

Physica ◽  
1956 ◽  
Vol 22 (6-12) ◽  
pp. 595-606 ◽  
Author(s):  
W. Bontinck ◽  
W. Dekeyser
Keyword(s):  
Calcium Fluoride ◽  
Fluoride Crystals

Mode of formation of intrinsic radiation defects in calcium fluoride crystals

1972 ◽  
Vol 15 (5) ◽  
pp. 733-735
Author(s):  
E. K. Zavadovskaya ◽  
A. T. Ovcharov ◽  
M. I. Kalinin ◽  
V. M. Lisitsyn
Keyword(s):  
Calcium Fluoride ◽  
Radiation Defects ◽  
Fluoride Crystals ◽  
Intrinsic Radiation
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