EiG Period Tower
Complete Coordinate System for Materials Science
📐 STRUCTURE
Each period = 120° arc
φ angle = arccos(IE/IE_C)
H/He at top → Heavy elements below
Radii: f-block (inner), s/p (mid), d-block (outer)
🖱️ Left-drag: rotate | Right-drag: pan | Scroll: zoom
🎨 BLOCKS
s-block
p-block
noble
d-block
f-block
s (0°-17°)
p (34°-103°)
noble (120°)
d (21°-64°)
f (56°-63°)
KEY:
All blocks interleave within 0°-120°
d-block and f-block do NOT extend beyond 120°
ELEMENT INFO
Click/hover on an element
Helix Pitch:
Radius Scale:
Element Size:
Label Size:
Period ribbons
Central axis
Element labels
Block separation
Auto-rotate