Girvasite
Krivovichev S V, Chernyatieva A P, Britvin S N, Yakovenchuk V N
Russian Geology and Geophysics 56 (2015) 155-163
The crystal structure of girvasite, NaCa2Mg3(PO4)3(CO3)(H2O)6, a complex
phosphate-carbonate hydrate based upon electroneutral heteropolyhedral layers
Note: T = 173 K
Locality: Zhelezny mine, Kovdor massif, Kola Peninsula, Russia
_database_code_amcsd 0020967
CELL PARAMETERS: 6.4784 12.2313 21.3494 90.000 89.624 90.000
SPACE GROUP: P2_1/c
X-RAY WAVELENGTH: 1.541838
Cell Volume: 1691.674
Density (g/cm3): 2.470
MAX. ABS. INTENSITY / VOLUME**2: 13.69272722
RIR: 1.805
RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
2-THETA INTENSITY D-SPACING H K L Multiplicity
8.28 100.00 10.6745 0 0 2 2
8.33 2.62 10.6129 0 1 1 4
11.00 3.66 8.0424 0 1 2 4
13.67 5.48 6.4783 1 0 0 2
14.48 7.57 6.1157 0 2 0 2
15.48 4.73 5.7249 1 1 0 4
16.05 2.12 5.5221 -1 0 2 2
16.05 1.27 5.5215 -1 1 1 4
16.71 2.01 5.3065 0 2 2 4
19.96 2.00 4.4480 -1 1 3 4
21.50 2.70 4.1326 1 0 4 2
21.61 2.48 4.1117 1 2 2 4
21.68 6.85 4.0985 -1 2 2 4
23.36 4.53 3.8087 0 3 2 4
25.03 14.88 3.5582 0 0 6 2
25.82 3.33 3.4506 1 3 0 4
26.08 2.96 3.4165 0 1 6 4
26.11 5.89 3.4132 -1 1 5 4
26.14 1.94 3.4090 -1 2 4 4
26.15 1.24 3.4083 1 3 1 4
27.19 2.87 3.2800 -1 3 2 4
27.54 2.37 3.2391 2 0 0 2
28.54 1.39 3.1274 1 0 6 2
28.75 5.62 3.1052 2 0 2 2
28.79 4.61 3.1009 2 1 1 4
28.86 11.25 3.0939 -2 0 2 2
29.03 6.01 3.0755 0 2 6 4
29.06 1.15 3.0731 -1 2 5 4
29.21 3.27 3.0578 0 4 0 2
29.48 1.08 3.0299 1 1 6 4
29.68 1.76 3.0098 2 1 2 4
30.31 4.02 2.9487 0 3 5 4
30.41 4.70 2.9396 0 4 2 4
30.81 4.22 2.9024 1 3 4 4
30.91 4.43 2.8931 -1 3 4 4
31.13 3.01 2.8728 2 1 3 4
31.25 2.45 2.8624 2 2 0 4
31.85 10.10 2.8094 0 4 3 4
32.38 6.20 2.7653 1 4 0 4
32.43 7.42 2.7611 -2 0 4 2
33.08 10.97 2.7082 2 1 4 4
33.37 3.59 2.6853 -1 1 7 4
33.42 1.58 2.6808 0 3 6 4
33.45 1.02 2.6792 -1 3 5 4
33.45 1.45 2.6787 1 4 2 4
33.50 1.82 2.6751 -1 4 2 4
33.82 2.01 2.6503 -2 2 3 4
34.40 3.01 2.6073 0 1 8 4
34.84 2.33 2.5751 -1 4 3 4
35.50 3.03 2.5287 2 2 4 4
36.13 3.56 2.4861 0 4 5 4
36.20 3.34 2.4814 1 3 6 4
36.32 1.74 2.4732 1 0 8 2
36.33 1.45 2.4728 -1 3 6 4
36.64 1.08 2.4525 -1 4 4 4
36.74 3.01 2.4459 0 2 8 4
36.80 3.55 2.4422 0 3 7 4
38.17 1.33 2.3581 2 1 6 4
39.62 2.53 2.2749 -1 5 1 4
41.29 2.49 2.1864 1 4 6 4
41.31 1.12 2.1854 2 3 5 4
41.48 1.73 2.1772 -1 5 3 4
42.70 1.68 2.1174 3 1 1 4
42.76 2.63 2.1147 -3 1 1 4
42.96 1.26 2.1051 1 5 4 4
43.01 2.38 2.1031 0 1 10 4
43.81 2.45 2.0663 2 0 8 2
44.05 1.55 2.0558 2 4 4 4
44.20 2.01 2.0493 -2 4 4 4
44.28 2.59 2.0457 -1 4 7 4
44.76 1.02 2.0247 -2 1 8 4
44.97 1.27 2.0158 0 5 6 4
45.09 2.28 2.0106 0 4 8 4
45.25 1.41 2.0041 1 1 10 4
46.11 1.40 1.9685 -2 4 5 4
46.67 3.24 1.9463 -2 2 8 4
47.17 1.63 1.9268 1 5 6 4
47.27 1.04 1.9229 1 4 8 4
47.66 2.14 1.9083 3 3 0 4
47.88 1.15 1.8997 -3 3 1 4
48.41 3.60 1.8804 3 3 2 4
48.51 1.17 1.8766 -3 3 2 4
49.55 1.15 1.8396 0 6 5 4
49.66 1.60 1.8357 2 5 4 4
49.76 1.05 1.8325 1 5 7 4
49.80 1.35 1.8310 -2 5 4 4
49.87 1.44 1.8285 -1 5 7 4
50.34 4.20 1.8127 -1 3 10 4
50.93 2.58 1.7929 -2 4 7 4
53.11 1.77 1.7244 0 7 2 4
53.39 1.41 1.7161 2 2 10 4
53.45 1.44 1.7143 2 5 6 4
54.36 1.44 1.6876 -1 4 10 4
58.53 1.19 1.5770 -3 4 6 4
59.60 1.14 1.5513 3 5 4 4
62.88 1.42 1.4780 3 2 10 4
67.45 1.02 1.3886 4 0 8 2
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XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.