For this purpose, many scintillators were developed, and [sup.6]Li-enriched elpasolite and LiCaAl[F.sub.6] scintillators have reached to the commercial stage.
Common scintillators possessing the functionalities of pulse discrimination are LiCaAl[F.sub.6] (152) and elpasolite (153) materials.
The topics include the real-time imaging of the electrical field distribution in CdZnTe at low temperature, modeling the crystal growth of CdZnTe, growing boron carbide crystals from a copper flux, scintillating metal organic frameworks as a new class of radiation detection materials, the opto-electrical characterization and x-ray mapping of large-volume CdZnTe radiation detectors, and the synthesis and structures of elpasolite
Minerals besides fluorite that have been found as inclusions in topaz are quartz, feldspar, albite, columbite, elpasolite
and smoky quartz.
Minerals identified in the pipe are: cryolite, cryolithionite, elpasolite, pachnolite, prosopite, ralstonite, thomsenolite, weberite and a new mineral with the composition [Na.sub.2]LiAI[F.sub.6] that has been named simmonsite.
The Zapot pegmatite represents the third known occurrence of the alumino-fluoride minerals cryolite, elpasolite, pachnolite, prosopite, and ralstonite in North America.
X-ray diffraction, optical, and electron microprobe studies show that this material is actually composed of four different alumino-fluoride minerals: roughly equal amounts of cryolite, cryolithionite, a new mineral having the composition [Na.sub.2]LiAl[F.sub.6] (simmonsite), and less than 1% anhedral elpasolite disseminated throughout the other minerals.
Elpasolite has two modes of occurrence: (1) as very small oval or circular (in cross-section) anhedral grains less than 20 micrometers across, enclosed in early stage Al-F minerals and (2) as one of several late-stage vug-filling alumino-fluoride minerals cutting the primary mixture of cryolite-cryolithionite-simmonsite.
Still more exotic species are found: brizziite, rosenbergite, elpasolite
A core of sugary, bright purple elpasolite with minor chiolite was found in a mass of brown, translucent cryolite and lavender-gray prosopite.
The paragenetic sequence of secondary aluminum fluorides observed in the pocket is: cryolite to elpasolite and chiolite, followed by thomsenolite, pachnolite and finally ralstonite.
Elpasolite was first identified at the Morefield mine as a bright purple, granular mass (Kearns, 1993a) intergrown with minor chiolite and surrounded by cryolite and prosopite.