i'm looking to get any information on materials with a 2.42 index of refraction
(like a diamond)i'll settle for a range between 2.3-2.5 as well

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Request for Question Clarification by welte-ga on 19 Mar 2006 10:09 PST

Hi eden1891-ga, Are you simply looking for a list of materials with an
index of refraction in this range (2.3-2.5)?  Any other requirements? 
Any other information about these materials that you require?
 
       -welte-ga

eden1891-ga,


There are numerous substances that meet your refraction criteria. 
I've listed them below, as gleaned from several online lists:



http://www.ps.missouri.edu/rickspage/refract/refraction.html

Wulfenite 2.3 

Chrome Yellow 2.31 

Crocoite 2.31 

Sphalerite 2.368 

Chrome Green 2.4 

Fabulite 2.409 

Strontium Titanate 2.41 

Diamond 2.417 

Chrome Red 2.42 

Anatase 2.49 




http://mineral.galleries.com/minerals/property/index.htm

Sphalerite 2.369 



http://www.kayelaby.npl.co.uk/general_physics/2_5/2_5_8.html

Arsenic trisulphide   2.4777

Barium fluoride   2.3816

Strontium titanate  2.4254

Zinc selenide  2.485  



http://hypertextbook.com/physics/waves/refraction/

eglestonite  2.49 

franklinite  2.36 

perovskite 2.38 

sphalerite  2.428 



I checked a number of other lists as well, but the materials quickly
began repeating.


I trust this list fully meets your needs.

However, if you find you'd like any additional information, don't
hesitate to ask.  Just post a Request for Clarification, and I'm at
your service.


pafalafa-ga


search strategy -- Google search on:  [ "index of refraction"  OR
"refractive index" 2.3..2.5 ]

Diamond has a remarkably high index, 2.42. Zinc Iron Sulphide
(Sphalerite) puts up good competition at 2.37. The common substitute
for diamond is Yittrium stablized Zirconia (YSZ), which has a cubic
crystal structure (Cubic Zirconia). CZ typically has an index around
2.17. Another high index material is Moissanite, a form of Silicon
Carbide with an index higher than diamond, around 2.67.