Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above
Moore P B , Louisnathan S J , Zeitschrift fur Kristallographie , 130 (1969) p.438-448, The crystal structure of fresnoite, Ba2(TiO)Si2O7, Positive polarity, Locality: sanbornite deposits of eastern Fresno County, California, USA
View Additional jPOWD Structure files for Fresnoite
[1]
Physical Properties of Fresnoite
Cleavage:
{001} Distinct
Color:
Greenish yellow, Lemon.
Density:
4.43
Hardness:
3-4 - Calcite-Fluorite
Luminescence:
Fluorescent, Short UV=yellow.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Fresnoite
Dichroism (e):
colorless.
Dichroism (w):
colorless.
Gladstone-Dale:
CI meas= 0.079 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1734,KPDmeas= 0.1738,KC= 0.1887 Ncalc = 1.84
Optical Data:
Uniaxial (-), e=1.765, w=1.775, bire=0.0100.
Calculated Properties of Fresnoite
Electron Density:
Bulk Density (Electron Density)=3.95 gm/cc note: Specific Gravity of Fresnoite =4.43 gm/cc.
Fermion Index:
Fermion Index = 0.11 Boson Index = 0.89
Photoelectric:
PEFresnoite = 245.71 barns/electron U=PEFresnoite x rElectron Density= 970.99 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Fresnoite is Not Radioactive
Fresnoite Classification
Dana Class:
55.04.02.01(55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions