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