Ercitite
Cooper M A, Hawthorne F C, Cerny P
The Canadian Mineralogist 47 (2009) 173-180
The crystal structure of ercitite, Na2(H2O)4[Mn3+2(OH)2(PO4)2],
and its relation to bermanite, Mn2+(H2O)4[Mn3+2(OH)2(PO4)2]
Locality: Tanco granitic pegmatite, Bernic Lake, southeastern Manitoba, Canada
_database_code_amcsd 0006278
CELL PARAMETERS: 6.2499 8.7479 19.9554 90.000 90.000 90.000
SPACE GROUP: Cmca
X-RAY WAVELENGTH: 1.541838
Cell Volume: 1091.032
Density (g/cm3): 2.755
MAX. ABS. INTENSITY / VOLUME**2: 26.76807230
RIR: 3.164
RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
2-THETA INTENSITY D-SPACING H K L Multiplicity
8.86 100.00 9.9777 0 0 2 2
17.78 3.46 4.9889 0 0 4 2
18.00 17.13 4.9279 1 1 1 8
20.30 1.75 4.3740 0 2 0 2
20.79 3.03 4.2725 0 2 1 4
22.19 11.68 4.0059 0 2 2 4
26.81 1.53 3.3259 0 0 6 2
27.11 25.42 3.2889 0 2 4 4
28.43 12.24 3.1396 1 1 5 8
29.96 3.26 2.9821 2 0 2 4
33.85 20.44 2.6483 2 0 4 4
33.86 10.02 2.6475 0 2 6 4
34.23 6.18 2.6196 1 3 1 8
35.13 3.56 2.5544 1 3 2 8
35.30 13.89 2.5427 2 2 0 4
35.59 2.84 2.5223 2 2 1 8
36.12 5.73 2.4867 1 1 7 8
36.47 7.80 2.4639 2 2 2 8
36.59 4.96 2.4558 1 3 3 8
37.66 5.68 2.3883 0 2 7 4
37.88 1.62 2.3751 2 2 3 8
39.79 4.04 2.2654 2 2 4 8
41.54 1.31 2.1740 0 4 1 4
41.68 5.68 2.1668 0 2 8 4
42.14 5.58 2.1445 2 2 5 8
43.56 1.16 2.0776 0 4 3 4
44.87 1.78 2.0200 2 2 6 8
45.68 1.09 1.9861 3 1 2 8
46.59 3.87 1.9495 2 0 8 4
46.88 1.21 1.9380 1 3 7 8
49.91 2.46 1.8273 0 4 6 4
51.31 2.61 1.7806 2 2 8 8
51.84 4.01 1.7636 2 4 2 8
54.31 2.43 1.6890 3 3 1 8
54.41 7.04 1.6863 2 4 4 8
54.56 1.54 1.6819 2 0 10 4
55.24 3.72 1.6630 0 0 12 2
55.91 2.41 1.6444 0 4 8 4
56.28 1.91 1.6346 2 4 5 8
58.51 6.72 1.5774 2 4 6 8
58.82 4.72 1.5698 2 2 10 8
59.13 5.16 1.5625 4 0 0 2
59.92 1.11 1.5437 4 0 2 4
61.09 1.17 1.5170 2 4 7 8
63.06 2.12 1.4741 0 4 10 4
63.98 1.57 1.4552 2 4 8 8
66.22 2.52 1.4113 4 2 4 8
67.27 2.75 1.3917 2 2 12 8
69.34 1.16 1.3552 0 2 14 4
69.91 1.94 1.3456 4 2 6 8
71.39 1.33 1.3213 2 6 0 4
72.11 1.66 1.3098 2 6 2 8
72.95 1.06 1.2968 2 0 14 4
73.01 1.13 1.2959 2 6 3 8
74.93 1.19 1.2673 4 2 8 8
83.45 1.53 1.1584 2 0 16 4
85.22 1.08 1.1387 4 0 12 4
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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.