- Argon 0.000008
- Helium 0.000008
- Air, room 0.000010
- Air, standard 0.000011
- Hydrogen 0.000011
- Nitrogen 0.000011
- Aerogel, silica 0.000144
- Soil, dry 0.008944
- Polysulfone 0.010750
- Sand, dry 0.011490
- Lead 0.012591
- Gasoline 0.014071
- Fused Silica 7940 0.014280
- Pyrex® 7740 0.014461
- Methanol 0.014576
- Diamond 0.015373
- UHMW Polyethylene 0.015376
- HDMW Polyethylene 0.015376
- Concrete, gravel 0.015817
- Mercury 0.016251
- LDMW Polyethylene 0.016597
- Flint Glass F4 0.016983
- Macor® Ceramic 0.017121
- Zerodur® 0.017338
- Granite 0.018344
- Crown Glass BK7 0.018587
- Paraffin Wax, solid 0.019350
- Astro Sitall® 0.019384
- Concrete, with Stones 0.019771
- Aluminum 5052 H32 0.020282
- Titanium 6AL-4V 0.020284
- Aluminum 6061 T6 0.020905
- Silver 0.021020
- Aluminum 2024 T3 0.021040
- Aluminum 2011 T3 0.021364
- Gold 24K 0.021411
- Aluminum 7075 T6 0.023199
- Platinum 0.023981
- PTFE, Teflon® 0.024596
- Ammonia, liquid 0.024668
- Beryllium Copper 172 0.026958
- Brass 360 0.027771
- Beeswax, solid 0.028100
- Copper 0.029600
- Stainless, Duplex 2205® 0.030205
- Beryllium, pure 0.030627
- Stainless, 17-4 PH 0.030881
- Stainless 316 & 316L 0.034396
- Stanless 304 & 304L 0.034396
- Salt Water 0.035164
- Fresh Water 0.035815
- Ammonia, liquid - gas 0.4203
- Paraffin Wax, solid-liquid 6.9660