Question

С
B A/3C4
A Al2C3
81. M/J 11/P12/Q10
Tanzanite is used as a gemstone for jewellery. It is a hy
Са
Its chemical composition is 14.04% calcium, 14.179
hydrogen.
35
(A, values: H = 1.0, 0 = 16.0, AI = 27.0, Si = 28.1, Ca =
What are the values of x and y?
X
у
А
1
1​

Answer 1

Answer:

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Answer 2

Answer:

Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate), caused by small amounts of vanadium.

• Category Sorosilicate: zoisite variety

Formula (repeating unit) (Ca2Al3(SiO4)(Si2O7)O(OH)) + (Cr,Sr)

• Strunz classification 09.BG.10

Crystal system Orthorhombic

Tanzanite/Zoisite. Chemical formula/composition: Zoisite's chemical formula is Ca2Al3Si3O12(OH) or Ca2AlAl2(SiO4)(Si2O7)O(OH). Tanzanite is a species of Zoisite and has the same chemistry. It is a calcium aluminum hydroxy silicate.