Cryptohalite
[CAS# 1309-32-6]

Identification

• Name: Cryptohalite
• Synonyms: Cryptohalite ((NH4)2(SiF6))
• Molecular Formula: (NH₄)₂(_SiF6)
• Molecular Weight: 178.15
• CAS Registry Number: 1309-32-6

Properties

• Density: 2.004 g/cm³ (25 ºC)^*
• Refractive index: 1.369 (589.3 nm)^*

^* Christie, W. A. K.; Records of the Geological Survey of India 1927, V59, P233-6.

Safety Data

• Hazardous Chemical?: Yes