Earthy - Dull, clay-like fractures with no visible crystalline affinities, (e.g. howlite).
Habit:
Microscopic Crystals - Crystals visible only with microscopes.
Hardness:
2-2.5 - Gypsum-Finger Nail
Luster:
Earthy (Dull)
Streak:
paler green
Optical Properties of Ferroceladonite
Gladstone-Dale:
CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.087 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2294,KPDmeas= 0.2098,KC= 0.211 Ncalc = 1.59 - 1.64
Optical Data:
Biaxial (?), b=1.64
Calculated Properties of Ferroceladonite
Electron Density:
Bulk Density (Electron Density)=3.02 gm/cc note: Specific Gravity of Ferroceladonite =3.05 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEFerroceladonite = 6.17 barns/electron U=PEFerroceladonite x relectron= 18.66 barns/cc.
Radioactivity:
GRapi = 139.42 (Gamma Ray American Petroleum Institute Units)
Concentration of Ferroceladonite per GRapi unit = 0.72 (%)
Estimated Radioactivity from Ferroceladonite - barely detectable
Ferroceladonite Classification
Dana Class:
71.02.02a.06b(71)Phyllosilicate Sheets of Six-Membered Rings