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Held P , Bohaty L , Acta Crystallographica, Section E , 58 (2002) p.i121-i123, Manganese(II) sulfate tetrahydrate (ilesite), Locality: synthetic
Physical Properties of Ilesite
Color:
Green, Greenish white, White.
Density:
2.261
Diaphaneity:
Transparent
Habit:
Aggregates - Made of numerous individual crystals or clusters.
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Hardness:
2-3 - Gypsum-Calcite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Magnetism:
Nonmagnetic
Streak:
white
Optical Properties of Ilesite
Gladstone-Dale:
CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2278,KPDmeas= 0.2287,KC= 0.231 Ncalc = 1.52