Structure Type 079: Ca2(Al,Fe)Al2Si3O13H (Epidote)

(Si blue, O red, Al green, Ca yellow, Fe dark blue)


Crystal Structure Data

Spacegroup Symbol:

P 21/m

Origin Offset:

(none)

Lattice Type:

P

Unit Cell Parameters

a [A]

b [A]

c [A]

alpha [deg]

beta [deg]

gamma [deg]

8.9140

5.6400

10.1620

90.000

115.400

90.000

Fractional Coordinates of Atoms in the Asymmetric Unit

Site Label

Element

x

y

z

M(1)

Al

0.0000

0.0000

0.0000

M(2)

Al

0.0000

0.0000

0.5000

A(1)

Ca

0.7562

0.7500

0.1510

A(2)

Ca

0.6042

0.7500

0.4241

M(3)

Fe

0.2946

0.2500

0.2245

O(1)

O

0.2339

0.9923

0.0410

O(10)

O

0.0838

0.2500

0.4298

O(2)

O

0.3040

0.9809

0.3554

O(3)

O

0.7957

0.0152

0.3382

O(4)

O

0.0528

0.2500

0.1294

O(5)

O

0.0417

0.7500

0.1471

O(6)

O

0.0683

0.7500

0.4078

O(7)

O

0.5164

0.7500

0.1825

O(8)

O

0.5281

0.2500

0.3099

O(9)

O

0.6265

0.2500

0.0990

Si(1)

Si

0.3396

0.7500

0.0473

Si(2)

Si

0.6851

0.2500

0.2744

Si(3)

Si

0.1844

0.7500

0.3189


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