.eus

.eus is the top-level domain for the Basque language.

In 2008, dotCYMRU, dotEUS, dotSCOT, and dotBZH formed ECLID. On 10 June 2013, ICANN approved the creation of the domain. However, use of the domain name was restricted until March–April 2014.

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Eus

Eus is a commune in the Pyrénées-Orientales department in southern France.

Geography

Eus is located in the canton of Prades and in the arrondissement of Prades.

Population

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References

Europium(II) sulfide

Europium (II) sulfide is the inorganic compound with the chemical formula EuS. It is a black, air-stable powder. Europium possesses an oxidation state of +II in europium sulfide, whereas the lanthanides exhibit a typical oxidation state of +III. Its Curie temperature (T_c) is 16.6 K. Below this temperature EuS behaves like a ferromagnetic compound, and above it exhibits simple paramagnetic properties. EuS is stable up to 500 °C in air, when it begins to show signs of oxidation. In an inert environment it decomposes at 1470 °C.

Structure

EuS crystallizes in face-centered cubic (FCC) crystal lattice with the rock salt structure. Both europium and sulfur have octahedral coordination geometry with a coordination number of six. The Eu-S bond lengths are 2.41 Å.

Preparation

In the preparation of EuS, powdered europium(III) oxide (Eu₂O₃) is treated with hydrogen sulfide (H₂S) at 1150 °C. The crude EuS product is purified by heating at 900 °C under vacuum to remove excess sulfur.