Refractive Indices

706.5

1.57489

656.3

1.57723

643.8

1.57789

632.8

1.57851

589.3

1.58131

587.6

1.58144

546.1

1.58481

486.1

1.59145

480.0

1.59229

435.8

1.59962

404.7

1.60664

365.0

1.61917

Constants of Dispersion Formula

2.4441937

-8.324561510

1.904735910

5.045563710

3.657647010

1.793551710

Relative Partial Dispersions  

0.2959

0.2462

0.2373

0.2343

0.5744

0.5088

-0.0005

-0.0017

Chemical Properties

Grade  

3

1

1

1

ThermalProperties

422

480

366

406

92

105

 Mechanical Properties

407

5980

2444

0.224

Stress-Optical 
Coefficient

Coloration Code

34/31

Other Properties

3.23

Internal Transmittance

2400

0.88

0.77

2200

0.911

0.830

2000

0.955

0.912

1800

0.981

0.963

1600

0.997

0.995

1400

0.999

0.998

1200

0.999

0.998

1060

0.999

0.998

1000

0.999

0.998

950

0.999

0.998

900

0.999

0.998

850

0.998

0.997

800

0.998

0.996

700

0.998

0.996

650

0.997

0.995

600

0.997

0.995

550

0.997

0.995

500

0.997

0.994

480

0.996

0.993

460

0.996

0.993

440

0.996

0.992

420

0.995

0.991

400

0.995

0.991

390

0.994

0.988

380

0.992

0.984

370

0.990

0.981

360

0.986

0.972

350

0.975

0.950

340

0.944

0.892

330

0.85

0.72

320

0.57

0.32

310

0.12

0.02

300

290

280