Phosphosiderite and Alunite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
2.74-2.76
2.6-2.9
Fracture
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Uneven
Conchoidal, Uneven
Cleavage
{010} Perfect, {001} Distinct
On {0001}, perfect
Mohs Hardness
3.5-4
3.5-4
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
KAl3(SO4)2(OH)6
Phosphosiderite and Alunite Chemical Formula
While comparing Phosphosiderite and Alunite 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 Phosphosiderite and Alunite chemical formula.
- Chemical formula of Phosphosiderite- Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
Phosphosiderite and Alunite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Phosphosiderite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phosphosiderite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Phosphosiderite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.