Creedite and Herderite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.70
2.90-3.02
Fracture
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Perfect on {100}
Indistinct on {110}
Chemical Composition
Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Creedite and Herderite Chemical Formula
While comparing Creedite and Herderite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Creedite and Herderite chemical formula.
- Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.
- Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Creedite and Herderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Creedite and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Creedite and Herderite Optical Properties during the identification of gemstone. Specific gravity of Creedite is 2.90-3.02 whereas that of Herderite is 2.90-3.02.