From the Greek acine - "axe" in allusion to the acute shape of typical crystals and the Greek, "Magnesia" a district in Thessaly in reference to the Mg in the chemical formula.
Name Pronunciation:
Axinite-(Mg)
Synonym:
Magnesio-axinite - Renamed Axinite-(Mg) by Mineralogical Record v39 (2008), 131
Lamellar - Thin laminae producing a lamellar structure.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Hardness:
6.5-7 - Pyrite-Quartz
Luminescence:
Fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Axinite-(Mg)
Gladstone-Dale:
CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2164,KPDmeas= 0.2098,KC= 0.2103 Ncalc = 1.67 - 1.69
Optical Data:
Biaxial (-), a=1.672-1.693, b=1.677-1.701, g=1.681-1.704, bire=0.0090-0.0110, 2V(Calc)=62-82, 2V(Meas)=69-87. Dispersion strong, r < v.
Pleochroism (x):
colorless, yellow, light brown, yellow brown, or pale green.
Pleochroism (y):
colorless, deep yellow, deep blue, pale violet, or violet.
Pleochroism (z):
colorless, pale green, olive yellow, brown, or dark violet.
Calculated Properties of Axinite-(Mg)
Electron Density:
Bulk Density (Electron Density)=3.26 gm/cc note: Specific Gravity of Axinite-(Mg) =3.28 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEAxinite-(Mg) = 3.05 barns/electron U=PEAxinite-(Mg) x rElectron Density= 9.95 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Axinite-(Mg) is Not Radioactive
Axinite-(Mg) Classification
Dana Class:
56.02.02.02(56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
(56.02)with cations in [4] and/or >[4] coordination
Chemical Formula: 
