Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above
Forms:
( 0 1 0) ( 1 1 0) ( 0 0 1)
Warning: this java applet does not work in some browsers because of security restrictions.
Physical Properties of Leadhillite
Cleavage:
{001} Perfect, {100} Indistinct
Color:
Colorless, Gray, Yellowish, White, Light blue.
Density:
6.26 - 6.55, Average = 6.4
Diaphaneity:
Transparent to translucent
Fracture:
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Habit:
Pseudo Hexagonal - Crystals show a hexagonal outline.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
2.5 - Finger Nail
Luminescence:
Fluorescent, Short UV=weak gray yellow, Long UV=weak grey yellow.
Luster:
Adamantine
Streak:
white
Optical Properties of Leadhillite
Gladstone-Dale:
CI meas= -0.164 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.133 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1463,KPDmeas= 0.1503,KC= 0.1291 Ncalc = 1.81 - 1.85
Chemical Formula: 
