Refractive Indices

706.5

1.61643

656.3

1.61925

643.8

1.62005

632.8

1.62080

589.3

1.62420

587.6

1.62435

546.1

1.62847

486.1

1.63663

480.0

1.63768

435.8

1.64678

404.7

1.65559

365.0

1.67162

Constants of Dispersion Formula

2.5679538

-8.690251210

2.260140810

1.083798910

-6.229919510

7.335647210

Relative Partial Dispersions  

0.2934

0.2442

0.2371

0.2337

0.5838

0.5162

-0.0005

-0.0007

Chemical Properties

Grade  

2

1

1

1

ThermalProperties

430

473

374

413

87

98

Mechanical Properties 

380

5785

2360

0.226

Stress-Optical 
Coefficient

Coloration Code

36/32

Other Properties

3.64

Internal Transmittance

2400

0.914

0.836

2200

0.934

0.873

2000

0.968

0.937

1800

0.985

0.970

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

0.999

0.998

600

0.999

0.998

550

0.999

0.998

500

0.999

0.998

480

0.998

0.997

460

0.998

0.996

440

0.997

0.994

420

0.995

0.991

400

0.994

0.988

390

0.990

0.980

380

0.984

0.968

370

0.977

0.955

360

0.960

0.921

350

0.921

0.849

340

0.82

0.68

330

0.57

0.32

320

0.16

0.03

310

300

290

280