Institute of Experimental Mineralogy
Russian Academy of Sciences
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142432, Chernogolovka, Moscow district
A.V. Chichagov +7(496)52-22320
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RICKARDITE
1, t-rickardite, f-rickardite, DN
Cu(2.8)Te(2)
Tetragonal P 4/nmm Z = 1
P4/nmm
21 .9 .1999
Ref.Str.:
Forman S.A., Peacock M.A. (1949)
* Amer. Mineral., 34, 441-451
Reserv:
Cu(4-x)Te(2), N.A.D.
Initial data from BDM-file
Lattice parameters (cub. angs.,degr.):
a = 3.98 alpha = 90.0
b = 3.98 beta = 90.0
c = 6.12 gamma = 90.0
Unit cell volume (cub. angs.) = 96.94
Molar volume ( cub.cm/mol.) = 58.39
Co-ordinates, thermal parameters, occupation for atomic positions:
NoP x/a y/b z/c B(j) atom / occupation
1 0.0 0.0 0.0 0.0 Cu = 1.00
2 0.0 0.5 0.27 0.0 Cu = 0.4 , Cu = 0.0
3 0.0 0.5 0.715 0.0 Te = 1.00
Co-ordinates for all atomic positions :
No NoP x/a y/b z/c
1 1 0.0 0.0 0.0
2 2 0.0 0.5 0.27
3 3 0.0 0.5 0.715
4 2 0.5 0.0 0.73
5 3 0.5 0.0 0.285
6 1 0.5 0.5 0.0
X-ray density (g/cm cub.) = 7.42
MU (1/cm) = 1393.484 Mass attenuation coefficient (cm**2/g) = 187.886
Selected interatomic distances (cation-anion,anion-anion):
NoP Atom Rad.sph. C.N. Distance NoP N.
(angs.) (angs.)
1 Cu 3.708 4
2.6462 3
2.6462 3
2.6462 3
2.6462 3
2 Cu ,Cu 3.708 6
2.7234 3
3.3966 3
2.8158 3
2.8158 3
2.8158 3
2.8158 3
3 Te 5.064 12
3.98 3
3.98 3
3.98 3
3.98 3
4.4821 3
3.853 3
4.4821 3
3.853 3
4.4821 3
3.853 3
4.4821 3
3.853 3
X-ray diffraction powder data (II), X-Ray W.L. = 1.54056(angs.):
No H K L Theta 2*Theta S LPG MF F I int.
( degree ) *100
1 0 0 1 7.231 14.461 0.082 123.3 2 28.1 2068.7
2 1 0 1 13.348 26.696 0.15 34.67 8 67.4 13426.1
3 0 0 2 14.58 29.159 0.163 28.74 2 49.3 1487.4
4 1 1 0 15.885 31.77 0.178 23.91 4 56.8 3278.9
5 1 1 1 17.533 35.066 0.196 19.3 8 67.3 7449.7
6 1 0 2 18.513 37.027 0.206 17.13 8 30.2 1331.8
7 1 1 2 21.83 43.661 0.241 11.87 8 132.4 17704.2
8 0 0 3 22.184 44.369 0.245 11.45 2 98.5 2363.0
9 2 0 0 22.773 45.545 0.251 10.79 4 138.6 8819.3
10 2 0 1 24.018 48.036 0.264 9.56 8 25.0 510.8
11 1 0 3 25.106 50.213 0.275 8.65 8 42.5 1326.6
12 2 1 1 26.788 53.577 0.293 7.46 16 53.7 3667.9
13 2 0 2 27.499 54.997 0.3 7.03 8 39.1 912.9
14 1 1 3 27.798 55.596 0.303 6.86 8 8.1 38.0
15 2 1 2 30.043 60.086 0.325 5.76 16 25.4 630.1
16 0 0 4 30.229 60.457 0.327 5.68 2 98.6 1173.5
17 1 0 4 32.641 65.281 0.35 4.8 8 43.8 783.5
18 2 0 3 32.734 65.468 0.351 4.77 8 85.8 2985.5
19 2 2 0 33.189 66.379 0.355 4.63 4 120.7 2871.5
20 2 2 1 34.173 68.346 0.365 4.35 8 22.3 184.0
21 1 1 4 34.963 69.925 0.372 4.15 8 16.5 96.3
22 2 1 3 35.053 70.106 0.373 4.13 16 36.9 958.3
23 3 0 1 36.448 72.897 0.386 3.83 8 47.1 723.5
24 2 2 2 37.05 74.1 0.391 3.71 8 34.3 371.9
25 3 1 0 37.736 75.471 0.397 3.59 8 40.4 499.5
26 3 1 1 38.67 77.339 0.406 3.44 16 51.5 1554.6
27 0 0 5 39.0 77.999 0.408 3.39 2 27.2 53.3
28 3 0 2 39.259 78.519 0.411 3.35 8 22.5 144.8
29 2 0 4 39.424 78.848 0.412 3.33 8 87.5 2168.7
30 1 0 5 41.178 82.356 0.427 3.12 8 15.9 66.8
31 3 1 2 41.435 82.869 0.43 3.09 16 102.5 5536.7
32 2 1 4 41.597 83.194 0.431 3.08 16 39.2 806.0
33 2 2 3 41.682 83.365 0.432 3.07 8 76.5 1527.5
34 1 1 5 43.335 86.669 0.445 2.93 8 94.2 2212.1
35 3 0 3 43.836 87.671 0.45 2.89 8 33.3 273.9
X-ray diffraction powder data (I)...X-Ray wave length = 1.54056 (angs.):
No H K L Theta 2*Theta d I int I int.n. I p.h.n. H(Si)
( degree ) (angstrem) *100 *100
1 0 0 1 7.231 14.461 6.12 2068.7 11.7 12.0 5.6
2 1 0 1 13.348 26.696 3.33651 13426.1 75.8 77.0 5.6
3 0 0 2 14.58 29.159 3.06 1487.4 8.4 8.5 5.6
4 1 1 0 15.885 31.77 2.81428 3278.9 18.5 18.7 5.6
5 1 1 1 17.533 35.066 2.5569 7449.7 42.1 42.4 5.7
6 1 0 2 18.513 37.027 2.42588 1331.8 7.5 7.6 5.7
7 1 1 2 21.83 43.661 2.07143 17704.2 100.0 100.0 5.7
8 0 0 3 22.184 44.369 2.04 2363.0 13.3 13.3 5.7
9 2 0 0 22.773 45.545 1.99 8819.3 49.8 49.7 5.7
10 2 0 1 24.018 48.036 1.89247 510.8 2.9 2.9 5.7
11 1 0 3 25.106 50.213 1.81542 1326.6 7.5 7.4 5.8
12 2 1 1 26.788 53.577 1.7091 3667.9 20.7 20.5 5.8
13 2 0 2 27.499 54.997 1.66825 912.9 5.2 5.1 5.8
14 2 1 2 30.043 60.086 1.53856 630.1 3.6 3.5 5.8
15 0 0 4 30.229 60.457 1.53 1173.5 6.6 6.5 5.8
16 1 0 4 32.641 65.281 1.42811 783.5 4.4 4.3 5.9
17 2 0 3 32.734 65.468 1.42449 2985.5 16.9 16.4 5.9
18 2 2 0 33.189 66.379 1.40714 2871.5 16.2 15.7 5.9
19 2 2 1 34.173 68.346 1.37136 184.0 1.0 1.0 5.9
20 2 1 3 35.053 70.106 1.34118 958.3 5.4 5.2 5.9
21 3 0 1 36.448 72.897 1.29655 723.5 4.1 3.9 6.0
22 2 2 2 37.05 74.1 1.27845 371.9 2.1 2.0 6.0
23 3 1 0 37.736 75.471 1.25859 499.5 2.8 2.7 6.0
24 3 1 1 38.67 77.339 1.23279 1554.6 8.8 8.3 6.0
25 2 0 4 39.424 78.848 1.21294 2168.7 12.2 11.6 6.0
26 3 1 2 41.435 82.869 1.16398 5536.7 31.3 29.3 6.1
27 2 1 4 41.597 83.194 1.16026 806.0 4.6 4.3 6.1
28 2 2 3 41.682 83.365 1.15831 1527.5 8.6 8.1 6.1
29 1 1 5 43.335 86.669 1.12244 2212.1 12.5 11.6 6.1
30 3 0 3 43.836 87.671 1.11217 273.9 1.5 1.4 6.2
Reference:
Chichagov A.V. et al.
Information-Calculating System on Crystal Structure Data of Minerals
(MINCRYST)
- Kristallographiya, v.35, n.3, 1990, p.610-616 (in Russian)
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