Critical Evaluation: Fluorene with Benzene (IUPAC SDS Volume 59)
Fluorene solubilities in benzene were retrieved from papers by Choi et al. (1), McLaughlin and Zainal (2), Mortimer (3) and Domanska et al. (4). All four studies values at several temperatures. There is no prior reason to exclude any of the four studies from the critical evaluation.
Regressional analysis of the experimental data as Ln x1 versus 1/T yielded the following mathematical relationship: Ln x1 = - 2668.6 (1/T) + 6.8891 (r=0.9995) for variation of fluorene solubility with absolute temperature (see graph).
Figure
Solubility graph
None
References:

1 Choi, P. B.; Williams, C. P.; Buehring, K. G.; McLaughlin, E.; J. Chem. Eng. Data 1985, 30, 403-409.
2 McLaughlin, E.; Zainal, H. A.; J. Chem. Soc. 1959, 863-867.
3 Mortimer, F. S.; J. Am. Chem. Soc. 1923, 45, 633-641.
4 Domanska, U.; Groves Jr., F. R.; McLaughlin, E.; J. Chem. Eng. Data 1993, 38, 88-94.