Refractive Indices

706.5

1.59926

656.3

1.60153

643.8

1.60217

632.8

1.60278

589.3

1.60550

587.6

1.60562

546.1

1.60890

486.1

1.61533

480.0

1.61615

435.8

1.62321

404.7

1.62994

365.0

1.64188

Constants of Dispersion Formula

2.5241755

-9.463599110

1.735199610

9.531395010

-6.077762510

4.606724710

Relative Partial Dispersions  

0.2963

0.2466

0.2375

0.2346

0.5706

0.5054

0.0001

-0.004

Chemical Properties

Grade  

1

1

1

1

ThermalProperties

523

581

469

516

84

94

 Mechanical  Properties

433

0.60

6530

2619

0.247

Stress-Optical 
Coefficient

Coloration Code

36/32

Other Properties

3.50

Internal Transmittance

2400

0.949

0.901

2200

0.960

0.922

2000

0.980

0.960

1800

0.990

0.980

1600

0.999

0.998

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

0.998

0.997

850

0.998

0.997

800

0.997

0.995

700

0.996

0.993

650

0.996

0.993

600

0.997

0.994

550

0.996

0.993

500

0.996

0.992

480

0.995

0.991

460

0.995

0.990

440

0.994

0.989

420

0.994

0.989

400

0.993

0.987

390

0.991

0.982

380

0.988

0.976

370

0.984

0.968

360

0.971

0.943

350

0.940

0.883

340

0.84

0.71

330

0.58

0.34

320

0.17

0.03

310

300

290

280