Refractive Indices

706.5

1.61228

656.3

1.61504

643.8

1.61582

632.8

1.61656

589.3

1.61990

587.6

1.62005

546.1

1.62408

486.1

1.63210

480.0

1.63312

435.8

1.64205

404.7

365.0

Constants of Dispersion Formula

2.5571053

-9.877559510

2.154194510

1.099760810

-4.856869210

5.601559010

Relative Partial Dispersions  

0.2938

0.2443

0.2365

0.2334

0.5837

0.5170

0.0000

0.0000

Chemical Properties

Grade  

1

1

2

1

ThermalProperties

584

630

528

562

79

88

Mechanical Properties

607

0.71

8344

3393

0.229

Stress-Optical 
Coefficient

Coloration Code

39/36

Other Properties

2.67

Internal Transmittance

2400

0.924

0.853

2200

0.940

0.884

2000

0.980

0.961

1800

0.989

0.979

1600

0.998

0.997

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

0.999

0.998

800

0.999

0.998

700

0.999

0.998

650

0.998

0.997

600

0.998

0.997

550

0.998

0.997

500

0.997

0.994

480

0.996

0.992

460

0.994

0.988

440

0.991

0.983

420

0.985

0.970

400

0.960

0.921

390

0.922

0.85

380

0.83

0.69

370

0.62

0.39

360

0.24

0.06

350

340

330

320

310

300

290

280