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A tentative Ge-Sr phase diagram in [Massalski2] was updated by [2005Pal], as introduced by [2006Oka].
Figure 1 shows the Ge-Sr phase diagram calculated by [2009Du] based primarily on the phase boundary data provided by [2005Pal]. In the phase diagram of [2005Pal], Ge1.85Sr (35.7 at.% Sr) exists in a very limited temperature range (30 °C) from 1015 to 985 °C. [2006Oka] suspected the existence of this phase in the stable state. Obviously [2009Du] accepted the reasoning in [2006Oka] because the whole sentence in [2009Du] is the same as in [2006Oka], although [2006Oka] is not listed in the reference. Another feature new in Fig. 1 is the eutectoidal decomposition of Ge3Sr5 at 929 °C. [2009Du] thinks that thermal effects observed earlier by [1970Sha] and [1972Osi] at around this temperature are related to this eutectoidal decomposition.
Ge-Sr phase diagram [2009Du]
References
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Okamoto, H. Ge-Sr (Germanium-Strontium). J. Phase Equilib. Diffus. 33, 423 (2012). https://doi.org/10.1007/s11669-012-0081-5
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DOI: https://doi.org/10.1007/s11669-012-0081-5