A known sample of monazite from EZ-ID. EZ-ID will match your taget scan against
library samples like this.
Heavy Rare Earths (HREEs) and Mineral Identification
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
1 Canal Street  ◊  Unit B1
Lawrence, MA 01840  USA
Tel: 978 687-1833  ◊  Fax: 978 945-0372

Copyright © 2012 Spectral Evolution, Inc
Heavy rare earths (HREEs) are only rare in minable quantities.
Heavy rare earths include:
  • Europium
  • Gadolinium
  • Terbium
  • Dysprosium
  • Holmium
  • Erbium
  • Thulium
  • Ytterbium
  • Lutetium
  • Yttrium

Heavy rare earths (HREEs) are important for a wide range of high
tech and energy applications. For example, dysprosium is used
for permanent magnets, europium for phosphors and fuel cells,
terbium for phosphors and permanent magnets, and yttrium for
red phosphor, fluorescent lamps, ceramics, and metal alloys.

Rare earth bearing minerals for HREEs can include monazite and
xenotime – two minerals that can be found in the spectral
libraries available with the oreXpress and EZ-ID. They are both
phosphate minerals. Xenotime is usually found in acidic and
alkaline rocks and occasionally in mica schists and quartz
gneisses. Monazite is associated with high specific gravity
minerals such as ilmenite, magnetite, rutile, and zircon.

Production of HREEs is tied to the production of principal
products where HREEs are a byproduct. Exploration and mining
of HREEs is usually unresponsive to market demand for
byproducts, contributing to the lack of available HREEs.

oreXpress spectrometer, and EZ-ID mineral identification
software, are well-suited for exploration geologists looking for
all types of HREE deposits.

Every oreXpress geological spectrometer includes our DARWin
SP Data Acquisition software and is available with
EZ-ID and the
Custom Library Builder Module. EZ-ID allows you to compare your
target sample with a known library of mineral spectra. EZ-ID
comes with the USGS spectral library and is available with the
SpecMIN library from
Spectral International.

EZ-ID features:
  • Fast and accurate identification of an unknown mineral to a
    known spectral library sample
  • Ease-of-use:  take your scan using an oreXpress or
    oreXpress platinum and see results in real-time
  • Simple, consistent user interface
  • USGS and SpecMIN libraries available
  • Weighted score for best matches
  • Include or exclude spectral regions of interest for optimal

Using an oreXpress with EZ-ID delivers the following benefits for
exploration geologists exploring for uranium:
  • Quickly take a lot of samples
  • Cover more ground in less time
  • More accurate data provides a more complete picture of
    what you are looking at
  • Less time and expense than waiting for samples to come
    back from the lab
  • Less drilling - better results quickly delivers a return-on-
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
A known sample of xenotime from EZ-ID.