In coarse-grained rhodonite ore (Noda-Tamagawa mine, Japan); as veinlets cutting rhodonite-goldmanite ore (Yamato mine, Japan).
IMA Status:
Approved IMA 1974
Locality:
In Japan, in the Yamato mine and on Amamioshima Island, Kagoshima Prefecture; in the Noda-Tamagawa mine, Iwate Prefecture; and in the Matsuo mine, Kochi Prefecture. Link to MinDat.org Location Data.
Name Origin:
Named for Zyunpei Harada (1898{1992), Emeritus Professor, Hokkaido University, Sapporo, Japan.
Aggregates - Made of numerous individual crystals or clusters.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Vitreous (Glassy)
Optical Properties of Haradaite
Gladstone-Dale:
CI meas= 0.174 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.147 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1964,KPDmeas= 0.1902,KC= 0.2301 Ncalc = 1.85 - 1.87
Optical Data:
Biaxial (?), a=1.713, b=1.721, g=1.734, bire=0.0210, 2V(Calc)=78, 2V(Meas)=90. Dispersion r < v very strong.
Pleochroism (x):
colorless or very pale green.
Pleochroism (y):
colorless or light yellowish green.
Pleochroism (z):
bluish green or bluish green.
Calculated Properties of Haradaite
Electron Density:
Bulk Density (Electron Density)=3.48 gm/cc note: Specific Gravity of Haradaite =3.68 gm/cc.
Fermion Index:
Fermion Index = 0.03 Boson Index = 0.97
Photoelectric:
PEHaradaite = 48.77 barns/electron U=PEHaradaite x rElectron Density= 169.58 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Haradaite is Not Radioactive
Chemical Formula: 
