Helium-three

https://en.wikipedia.org/wiki/Liquid_helium

$\rho_{He^3} = (1/8) \rho_{water} \approx 0.12 g/cm^3$

https://en.wikipedia.org/wiki/Liquid_helium

http://ltl.tkk.fi/research/theory/helium.html

http://fy.chalmers.se/~delsing/LowTemp/LectureNotes/LectureNotes13.PDF

1992 specific heat of He-3

• https://www.chemteam.info/Mole/Moles-to-Grams.html

• http://old.iupac.org/publications/books/gbook/green_book_2ed.pdf

Fermi energy https://en.wikipedia.org/wiki/Fermi_energy

https://onlinelibrary.wiley.com/doi/pdf/10.1002/phbl.19760321214
$T_F = 1.5 K$

superfluid transitions The extraordinary phases of liquid 3-He - David M. Lee

http://fy.chalmers.se/~delsing/LowTemp/LectureNotes/LectureNotes13.PDF

• specific heat

1973 Observation of a Second-Order Phase Transition and Its Associated Phase Diagram in Liquid He3 R. A. Webb, T. J. Greytak, R. T. Johnson, and J. C. Wheatley

1981 Specific Heat of Normal and Superfluid 3He

• 1974 “Fourth sound” in helium‐three confirms superfluidity?

https://physicstoday.scitation.org/doi/10.1063/1.3128530