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Subclass: Phosphates

Physical geology

Sis

Done: Ravil Kurmangaliyev

Marzhan Karimova

Alina Kukarskikh

Cheked: Medet A.

 

 

Subclass: Phosphates

The Phosphate Class is made up of minerals with a basic chemical unit of tetrahedral (AO4) groups with a negative three (-3) charge. The A can be either Phosphorus, Arsenic, Vanadium or Antimony. The basic chemical unit can be combined with metal ions on a one to one ratio or usually in more complex combinations with other ions such as hydroxide groups (OH), uranyl groups (UO2), a halogen or even water molecules.

The typical phosphate is vitreous to dull, often strongly colored, above average in density, average in hardness (4-7), and low in index of refraction unless ions such as lead are present. All other properties are variable. Many interesting and beautiful mineral specimens come from this class and although a large number of minerals are known to belong to this class, only some of the members of the Apatite Group are considered common.

 

Name Amblygonite   LiAl(PO4)F
Colour Milk-white, yellow
Lustre Sub-Vitreous, Resinous, Greasy, Pearly
Crystal system Triclinic
Hardness 5½ - 6  

 

Name Montebrasite   LiAl(PO4)(OH)
Colour White, colorless, gray
Lustre Sub-Vitreous, Resinous, Greasy, Pearly
Crystal system Triclinic
Hardness 5½ - 6  

 

Name Tavorite   LiFe3+(PO4)(OH)
Colour Grass-green, yellow-green
Lustre Sub-Vitreous, Resinous, Waxy, Greasy
Crystal system Triclinic
Hardness  

 

Name Triplite (Mn2+,Fe2+)2(PO4)(F,OH)
Colour Brown, red-brown, dark
Lustre Vitreous, Resinous
Crystal system Monoclinic
Hardness 5 - 5½  

 

Name Zwieselite   (Fe2+,Mn2+)2(PO4)F
Colour Dark brown; black
Lustre Sub-Vitreous, Resinous, Greasy
Crystal system Monoclinic
Hardness 5 - 5½  

 

 

Name Triploidite (Mn2+,Fe2+)2(PO4)(OH)
Colour Red-brown, light pink
Lustre Sub-Adamantine, Sub-Vitreous, Resinous, Greasy
Crystal system Monoclinic
Hardness 4½ - 5

 

 

Name Wagnerite (Mg,Fe2+)2(PO4)F
Colour Yellow, brown, red    
Lustre Sub-Vitreous, Resinous, Greasy
Crystal system Monoclinic
Hardness 5 - 5½

 

Name Wolfeite (Fe2+,Mn2+)2(PO4)(OH)
Colour Red-brown to dark brown
Lustre Sub-Adamantine, Sub-Vitreous, Resinous, Greasy
Crystal system Monoclinic
Hardness 4½ - 5

 

 

Name Stanĕkite (Mn2+,Fe2+,Mg)Fe3+(PO4)O
Colour Black
Lustre Greasy
Crystal system Monoclinic
Hardness 4 - 5

 



Name Joosteite Mn2+(Mn3+,Fe3+)(PO4)O
Colour grey with a brownish  
Lustre  
Crystal system Monoclinic
Hardness

 

 

Name Holtedahlite Mg2(PO4)(OH)
Colour Colorless
Lustre Vitreous
Crystal system Trigonal
Hardness 4½ - 5

 

Name Satterlyite (Fe2+,Mg,Fe)12(PO4)5(PO3OH)(OH,O)6
Colour Light brown, pale yellow
Lustre  
Crystal system Trigonal
Hardness 4½ - 5

 

Name Althausite Mg4(PO4)2(OH,O)(F,☐)
Colour Pale gray, reddish brown.
Lustre Sub-Vitreous, Resinous
Crystal system Orthorhombic
Hardness 3½ - 4

 

Name Lipscombite Fe2+Fe23+(PO4)2(OH)2
Colour  
Lustre  
Crystal system Tetragonal
Hardness  

 

Name Richellite CaFe23+(PO4)2(OH,F)2
Colour Yellow to yellow-brown
Lustre  
Crystal system Amorphous
Hardness 2 - 3

 

Name Zinclipscombite ZnFe23+(PO4)2(OH)2
Colour dark green to brown
Lustre  
Crystal system Tetragonal
Hardness

 

Name Libethenite Cu2(PO4)(OH)
Colour Light to dark green
Lustre Sub-Vitreous, Resinous, Waxy, Greasy
Crystal system Orthorhombic
Hardness

 

Name Zincolibethenite CuZn(PO4)(OH)
Colour Bright green, bluish tint
Lustre  
Crystal system Orthorhombic
Hardness  

 

Name Tarbuttite Zn2(PO4)(OH)
Colour White, colourless
Lustre Vitreous, Pearly
Crystal system Triclinic
Hardness

 

Name Barbosalite Fe2+Fe23+(PO4)2(OH)2
Colour Black to dark
Lustre Vitreous, Sub-Vitreous, Resinous, Waxy, Greasy, Dull
Crystal system Monoclinic
Hardness 5½ - 6

 

Name Hentschelite CuFe23+(PO4)2(OH)2
Colour  
Lustre  
Crystal system Monoclinic
Hardness

 

Name Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2
Colour Blue, sky-blue, bluish
Lustre Vitreous, Sub-Vitreous, Resinous, Greasy
Crystal system Monoclinic
Hardness 5½ - 6  

 

Name Scorzalite Fe2+Al2(PO4)2(OH)2
Colour Dark azure blue
Lustre Sub-Vitreous, Resinous, Greasy
Crystal system Monoclinic
Hardness

 

Name Trolleite Al4(PO4)3(OH)3
Colour Light green, colorless
Lustre Vitreous
Crystal system Monoclinic
Hardness 5½ - 6

 


Date: 2015-12-24; view: 174


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