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Eudialyte
Eudialyte

Polyhalite
Polyhalite



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Eudialyte
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Polyhalite

Eudialyte and Polyhalite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

H₂SO₄
Soluble

Durability

-
-

Specific Gravity

2.74-3.002.78
1 7.18
👆🏻

Fracture

Uneven
Conchoidal

Cleavage

Distinct on {0001} imperfect on {11 2 0}
Perfect on {10 1 }; parting on {010}

Mohs Hardness

5-5.53.5
2 10
👆🏻

Chemical Composition

Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
K2Ca2Mg(SO4)4·2H2O

Eudialyte and Polyhalite Chemical Formula

While comparing Eudialyte and Polyhalite 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 Eudialyte and Polyhalite chemical formula.

  • Chemical formula of Eudialyte- Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O

Eudialyte and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Eudialyte and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Eudialyte and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Eudialyte is 2.78 whereas that of Polyhalite is 2.78.