The phase diagram YF{sub 3}-GdF{sub 3}

Journal Article · Tue Mar 04 04:00:00 EST 2008 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2007.04.004· OSTI ID:21068220

Ranieri, I M ^[1]; Bertram, R ^[2]; Baldochi, S L ^[1]

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1. Center for Lasers and Applications, Inst. Pesquisas Energeticas and Nucl., CP 11049, Butanta 05422-970, Sao Paulo, SP (Brazil)
2. Institute for Crystal Growth, Max-Born-Str. 2, 12489 Berlin (Germany)

The binary phase diagram YF{sub 3}-GdF{sub 3} was studied by differential scanning calorimetry (DSC). Yttrium fluoride and gadolinium fluoride show complete miscibility in all three phases (orthorhombic room temperature phase, trigonal or hexagonal high temperature phase, liquid). The transformations between room temperature and high temperature phases are of first order and occur at 1338.6 K (YF{sub 3}) or 1174.8 K (GdF{sub 3}). Melting points are 1403.1 K (YF{sub 3}) or 1525.7 K (GdF{sub 3}), respectively. The c{sub p}(T) curve of GdF{sub 3} shows a {lambda} shaped local maximum at 1333 K that might be related to a further solid phase transformation of second order.

• OSTI ID: 21068220
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 3 Vol. 43; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALORIMETRY
GADOLINIUM FLUORIDES
MELTING POINTS
ORTHORHOMBIC LATTICES
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
SOLUBILITY
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 1000-4000 K
YTTRIUM FLUORIDES