Refractive Indices

706.5

1.79118

656.3

1.79611

643.8

1.79752

632.8

1.79885

589.3

1.80491

587.6

1.80518

546.1

1.81263

486.1

1.82774

480.0

1.82970

435.8

1.84721

404.7

1.86480

365.0

Constants of Dispersion Formula

3.1171483

-1.161627710

4.486497510

1.658849110

2.571685410

1.475765710

Relative Partial Dispersions  

0.2868

0.2381

0.2355

0.2315

0.6156

0.5442

0.0021

0.0132

Chemical Properties

Grade  

1

1

ThermalProperties

595

635

585

593

 Mechanical Properties

550

0.56

9170

3610

0.269

Stress-Optical 
Coefficient

2.64

Coloration Code

44/37

Other Properties

3.36

Internal Transmittance

2400

0.970

0.941

2200

0.980

0.960

2000

0.990

0.980

1800

0.994

0.988

1600

0.998

0.996

1400

0.999

0.997

1200

0.999

0.997

1060

0.999

0.997

1000

0.999

0.997

950

0.999

0.997

900

0.999

0.998

850

0.999

0.998

800

0.999

0.998

700

0.995

0.991

650

0.991

0.983

600

0.992

0.984

550

0.993

0.987

500

0.988

0.976

480

0.984

0.969

460

0.980

0.960

440

0.971

0.942

420

0.95

0.91

400

0.91

0.82

390

0.84

0.71

380

0.71

0.50

370

0.40

0.16

360

350

340

330

320

310

300

290

280