THE LITHIUM-STRONTIUM EQUILIBRIUM SYSTEM. Publication No. 1
Technical Report
·
OSTI ID:4802562
The complete equilibrium diagram of the lithiumstrontiunm system was determined by the use of differential thermal analysis and x-ray diffraction methods at room and high temperatures. The system displayed limited solubility at both ends. The degree of solubility of lithium in strontiunm varied with the allotropic modification of strontium. These modifications were beta (f.c.c.) up to 231 deg C; gamma (h.c.p.) between 231 and 623 deg C; and delta (b.c.c.) above 623 deg C. Three compounds were formed by peritectic reactions: liquid + ( gamma ) yields Sr/sub 8/Li (h.c.p) at 496 deg C; liquid + Sr/sub 8/Li yields Sr/sub 3/ Li/sub 2/ at 198 deg C; and liquid + Sr/sub 3/Li/sub 2/ yields Sr/sub 6/Li/sub 23/ at 152 deg C. A congruent melting compound approximating the formula Sr/sub 7/Li (body-centered tet.) had a melting point of 584 deg C. This compound formed a eutecttc with ( delta ) solid solution at a composition of 88.5 at.% strontium with a melting point of 578 deg C. Another eutectic formed between Sr/ sub 6/Li/sub 23/ and the lithium solid solution ( alpha ) at 12.5 at.% strontium with a melting point of 134 deg C. The compound, Sr/sub 7/Li and the ( delta ) solid solution decomposed by inverse peritectic reactions upon cooling; Sr/sub 7/ Li yields liquid + ( delta ) at 530 deg C; ( delta ) yields liquid + ( gamma ) at 515 deg C. The compound, Sr/sub 8/Li existed in two modiiications, the high temperature form (h.c.p.) transformed on cooling into a room temperature form (tet.) within the temperature range of 196 to 198 deg C. (auth)
- Research Organization:
- Syracuse Univ., N.Y.
- NSA Number:
- NSA-16-013587
- OSTI ID:
- 4802562
- Report Number(s):
- TID-15218
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALLOTROPY
CHEMICAL REACTIONS
COMPOUNDS
COOLING
DECOMPOSITION
DIFFRACTION
EUTECTICS
EXPANSION
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
LIQUIDS
LITHIUM ALLOYS
LITHIUM COMPOUNDS
MELTING
MELTING POINTS
METALS, CERAMICS, AND OTHER MATERIALS
NUMERICALS
PHASE DIAGRAMS
QUANTITATIVE ANALYSIS
REACTION KINETICS
SOLID SOLUTIONS
SOLUBILITY
STRONTIUM
STRONTIUM COMPOUNDS
TEMPERATURE
THERMODYNAMICS
X RADIATION
CHEMICAL REACTIONS
COMPOUNDS
COOLING
DECOMPOSITION
DIFFRACTION
EUTECTICS
EXPANSION
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
LIQUIDS
LITHIUM ALLOYS
LITHIUM COMPOUNDS
MELTING
MELTING POINTS
METALS, CERAMICS, AND OTHER MATERIALS
NUMERICALS
PHASE DIAGRAMS
QUANTITATIVE ANALYSIS
REACTION KINETICS
SOLID SOLUTIONS
SOLUBILITY
STRONTIUM
STRONTIUM COMPOUNDS
TEMPERATURE
THERMODYNAMICS
X RADIATION