Sphalerite

IMA-Approved Mineral Species

Properties and Data

Physical Properties

Composition

ZnS

Chemical Name

Zinc Sulfide

Molecular Weight

97.442 g/mol

Density

3.9 - 4.1 g/cm³

Mohs Hardness

3.5 - 4

Member of

Sphalerite Group

Crystal System

Isometric

Optical Properties

Type

Isotropic

Refractive Index

n = 2.368 - 2.5

Dispersion Factor

0.163

Additional Information

Otherwise known by Cleiophane, Blende, Zinc Blende, Ruby Blende, Ruby Jack, Marmatite, or Black Jack

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Variants and Types

Photo Source: https://www.wts-photonics.com/ir-windows-zinc-sulfide-zns-windows_p116.html

Intrinsic

Color: Colorless to Amber

Used for Specialty Optics

Cr:ZnS

Color: Amber to Vermillion

Cause: Chromium Ions

Used for Infrared Lasers, Specialty Optics

Production and Synthesis

Chemical Vapor Deposition

CVD

Involves leeching specialty gasses onto a heated / pressurized environment with seed crystals. Slowly builds up atomic layers of material until a solid crystal is produced.

References

REFERENCES

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