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86370

Sigma-Aldrich

Tellurium dioxide

≥97.0%

Synonym(s):

Telluria, Tellurium oxide

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About This Item

Linear Formula:
TeO2
CAS Number:
7446-07-3
Molecular Weight:
159.60
EC Number:
231-193-1
MDL number:
MFCD00011263
UNSPSC Code:
12352303
PubChem Substance ID:
57653113
NACRES:
NA.23

assay

≥97.0%

form

powder

mp

733 °C (lit.)

density

5.67 g/mL at 25 °C (lit.)

SMILES string

O=[Te]=O

InChI

1S/O2Te/c1-3-2

InChI key

LAJZODKXOMJMPK-UHFFFAOYSA-N

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General description

Tellurium dioxide (TeO2) is a ceramic material that can be used as a semiconducting oxide. It has a wide band gap and high mobility as determined by density functional theory (DFT) calculations. In bulk quantity, it exists in two polymorphs which include tetragonal α-TeO2 and orthorhombic β-TeO2.

Application

TeO2 can be potentially used in medical imaging and industrial monitoring processes.

signalword

Danger

Hazard Classifications

Acute Tox. 4 Inhalation - Aquatic Chronic 2 - Lact. - Repr. 1B - Skin Sens. 1B

Storage Class

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Gamma radiation-induced changes in the electrical and optical properties of tellurium dioxide thin films
Arshak K and Korostynska O
IEEE Sensors Journal, 3(6), 717-721 (2003)
Ultrathin tellurium dioxide: emerging direct bandgap semiconductor with high-mobility transport anisotropy
Guo S, et al.
Nanoscale, 10(18), 8397-8403 (2018)
Qiu-Hua Nie et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 61(8), 1939-1943 (2005-05-03)
The new Er3+/Yb3+ co-doped 70TeO2-5Li2O-(25-x)B2O3-xGeO2 (x = 0, 5, 10, 15 fand 20 mol.%) glasses were prepared. The thermal stability, absorption spectra, emission spectra and lifetime of the 4I(13/2) level of Er3+ ions were measured and studied. The FT-IR spectra
R Balda et al.
Optics express, 17(11), 8781-8788 (2009-05-26)
In this work, we report the near-infrared emission properties of Tm(3+)-Er(3+) codoped tellurite TeO(2)-WO(3)-PbO glasses under 794 nm excitation. A broad emission from 1350 to 1750 nm corresponding to the Tm(3+) and Er(3+) emissions is observed. The full width at
Ganxin Chen et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 72(4), 734-737 (2008-12-30)
We report on spectroscopic properties and energy transfer of Tm(3+)/Ho(3+)-codoped tungsten tellurite glasses for 1.47microm amplifier. Fluorescence spectra and the analysis of energy transfer indicate that Ho(3+) is an excellent codopant for 1.47microm emission. Comparing with other tellurite glasses, the
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