D. A. Boyd, Sulfur and Its Role In Modern Materials Science, Angewandte Chemie International Edition, vol.134, issue.50, pp.2-19
DOI : 10.1021/ja211766q

W. H. Zachariasen, Crystal chemical studies of the 5f-series of elements. VII. The crystal structure of Ce2O2S, La2O2S and Pu2O2S, Acta Crystallographica, vol.2, issue.1, pp.60-62, 1949.
DOI : 10.1107/S0365110X49000138

T. Vovan, J. Dugué, and M. Guittard, Oxysulfures mixtes de chrome III et de terres rares, Materials Research Bulletin, vol.13, issue.11, pp.1163-1166, 1978.
DOI : 10.1016/0025-5408(78)90204-0

J. Dugué, T. Vovan, and J. Villers, Etude Structurale Des Oxysulfures de Chrome(Ill) et de Terres Rares. I. Structure de I'Oxysulfure LaCrOS 2, Acta Crystallogr, issue.4, pp.36-1291, 1980.

J. Dugué, T. Vovan, and J. Villers, Etude structurale des oxysulfures de chrome(III) et de terres rares. II. Structure de l'oxysulfure CeCrOS2, Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, vol.36, issue.6, pp.1294-12974, 1980.
DOI : 10.1107/S056774088000595X

G. Quezel, R. Ballestracci, and J. Rossat-mignod, Proprietes magnetiques des oxysulfures de terres rares, Journal of Physics and Chemistry of Solids, vol.31, issue.4, pp.669-684, 1970.
DOI : 10.1016/0022-3697(70)90201-5

J. H. Dickerson, Remarkable Optical and Magnetic Properties of Ultra-Thin Europium

O. J. Nanorods, V. Mater-biondo, P. W. Sarvezuk, F. F. Ivashita, K. L. Silva et al., Geometric Magnetic Frustration, Chem, vol.2012, issue.22339, p.16728

F. Zhao, M. Yuan, W. Zhang, and S. Gao, Monodisperse Lanthanide Oxysulfide Nanocrystals, Journal of the American Chemical Society, vol.128, issue.36, pp.128-11758, 2006.
DOI : 10.1021/ja0638410

S. Gai, C. Li, P. Yang, and J. Lin, Recent Progress in Rare Earth Micro/Nanocrystals: Soft Chemical Synthesis
DOI : 10.1021/cr4001594

Y. Huang, L. Chen, and L. Wu, Crystalline Nanowires of Ln2O2S, LnS2 (Ln ) La, Nd), and La2O2S:Eu3+. Conversions via the Boron-Sulfur Method That Preserve Shape, pp.739-743, 2008.

Z. Liu, X. Sun, S. Xu, J. Lian, X. Li et al., -Doped Lanthanum Oxysulfide Nanocrystals. Gelatin-Templated Synthesis and Luminescence Properties, The Journal of Physical Chemistry C, vol.112, issue.7, pp.112-2353, 2008.
DOI : 10.1021/jp0764687

Y. Ding, J. Gu, J. Ke, Y. W. Zhang, and C. Yan, Sodium Doping Controlled Synthesis of Monodisperse Lanthanide Oxysulfide Ultrathin Nanoplates Guided by 27
DOI : 10.1002/anie.201105025

X. Fan and X. Qiao, Combustion Synthesis and up-Conversion Luminescence of La2O2S:Er3+,Yb3+ Nanophosphors, J. Solid State Chem. 2015, vol.226, pp.255-261
URL : https://hal.archives-ouvertes.fr/hal-01131935

J. Thirumalai and R. Chandramohan, Vijayan, T. a. Synthesis, Characterization and Formation Mechanism of Monodispersed Gd2O2S:Eu3+ Nanocrystals, J. Mater. Sci

S. A. Osseni, S. Lechevallier, M. Verelst, C. Dujardin, J. Dexpert-ghys et al., New nanoplatform based on Gd2O2S:Eu3+ core: synthesis, characterization and use for in vitro bio-labelling, Journal of Materials Chemistry, vol.112, issue.1, p.18365, 2011.
DOI : 10.1021/jp808343f

J. Liu, H. Luo, P. Liu, L. Han, X. Zheng et al., One-pot solvothermal synthesis of uniform layer-by-layer self-assembled ultrathin hexagonal Gd2O2S nanoplates and luminescent properties from single doped Eu3+ and codoped Er3+, Yb3+, Dalton Transactions, vol.2, issue.2, pp.41-13984
DOI : 10.1039/c2ra00009a

F. J. Medellín-rodríguez and G. Palestino, Synthesis, Characterization, and Photoluminescence Properties of Gd:Tb Oxysulfide Colloidal Particles, Chem. Eng. J, vol.2014, issue.2586, pp.136-145

L. Lei, S. Zhang, H. Xia, Y. Tian, J. Zhang et al., Controlled Synthesis of Lanthanide-Doped Gd 2 O 2 S Nanocrystals with Novel Excitation-Dependent Multicolor Emissions, Nanoscale, vol.2017, issue.17, pp.9-5718

T. Hirai and T. Orikoshi, Preparation of yttrium oxysulfide phosphor nanoparticles with infrared-to-green and -blue upconversion emission using an??emulsion liquid membrane system, Journal of Colloid and Interface Science, vol.273, issue.2, pp.470-477, 2004.
DOI : 10.1016/j.jcis.2003.12.013

M. Xing, W. Cao, T. Pang, and X. Ling, Synthesis of Monodisperse Spherical Y2O2S:Yb,Ho Upconversion Nanoparticles. Solid State Commun, pp.23-24, 2009.
DOI : 10.1016/j.ssc.2009.03.031

W. Li, Y. Liu, and P. Ai, Synthesis and luminescence properties of red long-lasting phosphor Y2O2S:Eu3+, Mg2+, Ti4+ nanoparticles, Materials Chemistry and Physics, vol.119, issue.1-2, pp.52-56, 2010.
DOI : 10.1016/j.matchemphys.2009.07.037

Y. Fu, W. Cao, Y. Peng, X. Luo, and M. Xing, The upconversion luminescence properties of the Yb3+???Ho3+ system in nanocrystalline Y2O2S, Journal of Materials Science, vol.40, issue.6, pp.45-6556, 2010.
DOI : 10.1007/s10853-010-4744-5

H. Wang, M. Xing, X. Luo, X. Zhou, Y. Fu et al., Upconversion emission colour modulation of Y2O2S: Yb, Er under 1.55??m and 980nm excitation, Journal of Alloys and Compounds, vol.587, pp.344-348, 2014.
DOI : 10.1016/j.jallcom.2013.10.163

X. Lu, M. Yang, L. Yang, Q. Ma, X. Dong et al., Y2O2S:Yb3+, Er3+ nanofibers: novel fabrication technique, structure and up-conversion luminescent characteristics, Journal of Materials Science: Materials in Electronics, vol.2, issue.6, pp.26-4078
DOI : 10.1039/c2ra00009a

H. Bakhtiari, M. R. Ghasemi, A. Hashemizadeh-aghda, H. Noorkojouri, P. Sarabadani et al., Effect of Europium Dopant Concentration on Particle Size and Luminescence of Yttrium Oxysulfide Nanoparticles Prepared by Urea Homogenous Precipitation, Journal of Cluster Science, vol.27, issue.5, pp.26-1671
DOI : 10.1007/BF01154096

J. Gu, Y. Ding, J. Ke, Y. Zhang, and C. Yan, Controllable Synthesis of Monodispersed Middle and Heavy Rare Earth Oxysulfide Nanoplates Based on the Principles of HSAB Theory, Acta Chimica Sinica, vol.71, issue.3, pp.71-360
DOI : 10.6023/A12121014

J. Flahaut, M. Guittard, and M. Patrie, Les Oxysulfures Me2O2S Des Éléments Du Groupe Des Terres Rares, Bull. Soc. Chim. Fr, vol.7, pp.990-994, 1958.

C. Sourisseau, R. Cavagnat, R. Mauricot, F. Boucher, and M. Evain, Structure and bondings in cerium oxysulfide compounds. I???Electronic, infrared and resonance Raman spectra of Ce2.0O2.5S, Journal of Raman Spectroscopy, vol.28, issue.12, pp.28-965, 1997.
DOI : 10.1002/(SICI)1097-4555(199712)28:12<965::AID-JRS191>3.0.CO;2-D

C. Sourisseau, M. Fouassier, R. Mauricot, F. Boucher, and M. Evain, Structure and bonding in cerium oxysulfide compounds. II???Comparative lattice dynamics calculations on Ce2O2S and Ce2.0O2.5S, Journal of Raman Spectroscopy, vol.28, issue.12, pp.28-973, 1997.
DOI : 10.1002/(SICI)1097-4555(199712)28:12<973::AID-JRS192>3.0.CO;2-F

J. Cheng, J. Zhu, X. Wei, and P. K. Shen, Ce 2 O 2 S Anchored on Graphitized Carbon with Tunable Architectures as a New Promising Anode for Li-Ion Batteries, J. Mater

L. Yang, Z. Cai, L. Hao, Z. Xing, Y. Dai et al., Nano Ce 2 O 2 S with Highly Enriched Oxygen-Deficient Ce 3+ Sites Supported by N and S Dual-Doped Carbon as an Active Oxygen-Supply Catalyst for the Oxygen Reduction Reaction, ACS Appl. Mater. Interfaces, vol.2017, issue.927, pp.22518-22529

P. Frank, B. Hedman, R. M. Carlson, T. A. Tyson, A. L. Roe et al., A large reservoir of sulfate and sulfonate resides within plasma cells from ascidia ceratodes, revealed by x-ray absorption near-edge structure spectroscopy, Biochemistry, vol.26, issue.16, pp.4975-4979, 1987.
DOI : 10.1021/bi00390a014

A. Vairavamurthy, B. Manowitz, G. W. Luther, and Y. Jeon, Oxidation state of sulfur in thiosulfate and implications for anaerobic energy metabolism, Geochimica et Cosmochimica Acta, vol.57, issue.7
DOI : 10.1016/0016-7037(93)90020-W

J. Prietzel, J. Thieme, N. Tyufekchieva, D. Paterson, and I. Mcnulty, Kögel-knabner, I. Sulfur Speciation in Well-Aerated and Wetland Soils in a Forested Catchment Assessed by Sulfur K -Edge X-Ray Absorption near-Edge Spectroscopy ( XANES ) J

B. Morgan, E. D. Burton, and A. W. Rate, Iron monosulfide enrichment and the presence of organosulfur in eutrophic estuarine sediments, Chemical Geology, vol.296, issue.297, pp.296-297
DOI : 10.1016/j.chemgeo.2011.12.005

J. A. Rodriguez, S. Chaturvedi, J. C. Hanson, and J. L. Brito, ChemInform Abstract: Reaction of H2 and H2S with CoMoO4 and NiMoO4: TPR, XANES, Time-Resolved XRD, and Molecular-Orbital Studies., ChemInform, vol.103, issue.20, pp.770-781, 1999.
DOI : 10.1002/chin.199920010

J. A. Rodriguez, T. Jirsak, A. Freitag, J. C. Hanson, J. Z. Larese et al., Interaction of SO2 with CeO2 and Cu/CeO2 Catalysts: Photoemission, XANES and TPD Studies, Catalysis Letters, vol.62, issue.2/4, pp.113-119, 1999.
DOI : 10.1023/A:1019007308054

J. Mcmaster, W. Lewis, A. J. Blake, A. Kerridge, and S. T. Liddle, Emergence of Comparable Covalency in Isostructural Cerium( <scp>iv</scp> )? and Uranium( <scp>iv</scp> )?carbon Multiple Bonds, Chem. Sci, vol.2016, issue.75, pp.3286-3297

K. Ikeue, T. Kawano, M. Eto, D. Zhang, and M. Machida, X-ray structural study on the different redox behavior of La and Pr oxysulfates/oxysulfides, Journal of Alloys and Compounds, vol.451, issue.1-2, pp.338-340, 2008.
DOI : 10.1016/j.jallcom.2007.04.145

G. Jiang, X. Wei, S. Zhou, Y. Chen, C. Duan et al., Neodymium doped lanthanum oxysulfide as optical temperature sensors, Journal of Luminescence, vol.152, pp.156-159, 2014.
DOI : 10.1016/j.jlumin.2013.10.027

G. Jiang, X. Wei, Y. Chen, C. Duan, M. Yin et al., Luminescent La2O2S:Eu3+ nanoparticles as non-contact optical temperature sensor in physiological temperature range, Materials Letters, vol.143, pp.98-100, 2015.
DOI : 10.1016/j.matlet.2014.12.057

A. Bagheri, K. Rezaee-ebrahim-saraee, H. R. Shakur, and H. Zamani-zeinali, Synthesis and characterization of physical properties of Gd2O2S:Pr3+ semi-nanoflower phosphor, Applied Physics A, vol.25, issue.5, pp.122-123
DOI : 10.1016/S0928-4931(03)00030-4

Q. Zhao, Y. Zheng, N. Guo, Y. Jia, H. Qiao et al., You, H. 3D-Hierarchical Lu2O2S:Eu3+ Micro/nano-Structures: Controlled Synthesis and Luminescence Properties, CrystEngComm, vol.2012, issue.20, pp.14-6659

G. Wang, H. Zou, B. Zhang, Y. Sun, Q. Huo et al., Preparation and luminescent properties of 1D Lu2O2S:Eu3+ nanorods, Optical Materials, vol.45, pp.2015-131
DOI : 10.1016/j.optmat.2015.03.020

J. Cichos, M. Karbowiak, D. Hreniak, and W. Str?k, Synthesis and characterization of monodisperse Eu3+ doped gadolinium oxysulfide nanocrystals, Journal of Rare Earths, vol.34, issue.8, pp.34-850
DOI : 10.1016/S1002-0721(16)60105-9

L. Vegard, Die Konstitution Der Mischkristalle Und Die Raumfüllung Der Atome. Zeitschrift für Phys, pp.17-26, 1921.
DOI : 10.1007/bf01349680

A. R. Denton and N. W. Ashcroft, Vegard???s law, Physical Review A, vol.1, issue.6, pp.3161-3164, 1991.
DOI : 10.1088/0953-8984/1/41/026

Y. Uwamino, T. Ishizuka, and H. Yamatera, X-ray photoelectron spectroscopy of rare-earth compounds, Journal of Electron Spectroscopy and Related Phenomena, vol.34, issue.1, pp.67-78, 1984.
DOI : 10.1016/0368-2048(84)80060-2

R. S. Smart, W. M. Skinner, and A. R. Gerson, XPS of sulphide mineral surfaces: metal-deficient, polysulphides, defects and elemental sulphur, Surface and Interface Analysis, vol.10, issue.1, pp.101-105, 1999.
DOI : 10.1016/S0892-6875(97)00048-4

A. S. Manocha and R. L. Park, Flotation related ESCA studies on PbS surfaces, Applications of Surface Science, vol.1, issue.1, pp.129-141, 1977.
DOI : 10.1016/0378-5963(77)90011-3