Institute of Experimental Mineralogy Russian Academy of Sciences ------------------------------------------------- 142432, Chernogolovka, Moscow district A.V. Chichagov +7(496)52-22320 *** *** W W W - X R A Y P O L *** *********************** APATITE 3, rare-earth bearing, f-apatite Ca(10)[PO(4)](6)(OH,F,Cl)(2) Hexagonal P 6(3)/m Z = 1 R =0.015 NR =557 9 .3 .1992 Ref.Str.: Hughes J.M., Cameron M., Mariano A.N. (1991) * Amer. Mineral., 76, 1165-1173 Reserv: [Ca(7.67)Na(0.95)Mn(0.01)Fe(0.03)Sr(0.02)Y(0.03)La(0.34)Ce(0.57)Pr(0.04)- Nd(0.20)Sm(0.02)Gd(0.01)](9.89)[P(5.78)Si(0.32)](6.10)O(24)F(2.16) Initial data from BDM-file Lattice parameters (cub. angs.,degr.): a = 9.4052 alpha = 90.0 b = 9.4052 beta = 90.0 c = 6.9125 gamma = 120.0 Unit cell volume (cub. angs.) = 529.54 Molar volume ( cub.cm/mol.) = 318.96 Co-ordinates, thermal parameters, occupation for atomic positions: NoP x/a y/b z/c B(j) atom / occupation 1 0.6667 0.3333 0.9988 0.99 Ca = 0.66, Na = 0.24 2 0.9886 0.2388 0.25 0.89 Ca = 0.84, Ce = 0.09, La = 0.06 3 0.3688 0.3969 0.25 0.63 P = 0.95, Si = 0.05 4 0.4821 0.3233 0.25 1.14 O = 1.00 5 0.4671 0.5853 0.25 1.35 O = 1.00 6 0.2557 0.3396 0.0721 1.65 O = 1.00 7 0.0 0.0 0.25 2.5 F = 1.00 Co-ordinates for all atomic positions : No NoP x/a y/b z/c 1 1 0.6667 0.3333 0.9988 2 2 0.9886 0.2388 0.25 3 3 0.3688 0.3969 0.25 4 4 0.4821 0.3233 0.25 5 5 0.4671 0.5853 0.25 6 6 0.2557 0.3396 0.0721 7 7 0.0 0.0 0.25 8 2 0.7612 0.7497 0.25 9 2 0.2503 0.0114 0.25 10 3 0.6031 0.9719 0.25 11 3 0.0281 0.6312 0.25 12 4 0.6767 0.1588 0.25 13 4 0.8412 0.5179 0.25 14 5 0.4147 0.8818 0.25 15 5 0.1182 0.5329 0.25 16 6 0.6604 0.9161 0.0721 17 6 0.0839 0.7443 0.0721 18 1 0.3333 0.6667 0.4988 19 2 0.0114 0.7612 0.75 20 3 0.6312 0.6031 0.75 21 4 0.5179 0.6767 0.75 22 5 0.5329 0.4147 0.75 23 6 0.7443 0.6604 0.5721 24 7 0.0 0.0 0.75 25 2 0.2388 0.2503 0.75 26 2 0.7497 0.9886 0.75 27 3 0.3969 0.0281 0.75 28 3 0.9719 0.3688 0.75 29 4 0.3233 0.8412 0.75 30 4 0.1588 0.4821 0.75 31 5 0.5853 0.1182 0.75 32 5 0.8818 0.4671 0.75 33 6 0.3396 0.0839 0.5721 34 6 0.9161 0.2557 0.5721 35 1 0.6667 0.3333 0.5012 36 6 0.2557 0.3396 0.4279 37 6 0.6604 0.9161 0.4279 38 6 0.0839 0.7443 0.4279 39 1 0.3333 0.6667 0.0012 40 6 0.7443 0.6604 0.9279 41 6 0.3396 0.0839 0.9279 42 6 0.9161 0.2557 0.9279 X-ray density (g/cm cub.) = 3.34 MU (1/cm) = 360.352 Mass attenuation coefficient (cm**2/g) = 107.764 Selected interatomic distances (cation-anion,anion-anion): NoP Atom Rad.sph. C.N. Distance NoP N. (angs.) (angs.) 1 Ca ,Na 2.88 9 2.4236 4 2.4236 4 2.4236 4 2.4676 5 2.4675 5 2.4675 5 2.8267 6 2.8266 6 2.8265 6 2 Ca ,Ce ,La 2.88 7 2.518 6 2.3019 7 2.6388 4 2.4007 5 2.357 6 2.518 6 2.357 6 3 P ,Si 2.232 4 1.5338 4 1.5349 5 1.5366 6 1.5366 6 4 O 3.264 7 2.5376 5 2.5291 6 2.9284 4 2.9284 4 2.9674 6 2.5291 6 2.9674 6 5 O 3.264 9 2.5376 4 2.4922 6 3.0648 5 3.0648 5 2.9733 6 3.2267 6 2.4922 6 2.9733 6 3.2267 6 6 O 3.264 9 2.5291 4 2.4922 5 3.1331 7 2.9733 5 3.2267 5 2.9675 4 2.4595 6 3.0491 6 3.0493 6 7 F 3.228 6 3.1331 6 3.1331 6 3.1331 6 3.1331 6 3.1331 6 3.1331 6 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 1 0 0 5.427 10.853 0.061 220.65 6 3.0 4.3 2 1 0 1 8.404 16.808 0.095 90.69 12 10.4 42.0 3 1 1 0 9.427 18.855 0.106 71.62 6 36.1 199.8 4 2 0 0 10.903 21.805 0.123 53.01 6 31.4 112.2 5 1 1 1 11.426 22.853 0.129 48.07 12 4.8 4.8 6 2 0 1 12.681 25.362 0.142 38.64 12 6.3 6.6 7 0 0 2 12.877 25.755 0.145 37.41 2 189.1 954.5 8 1 0 2 14.011 28.021 0.157 31.29 12 41.2 227.5 9 1 2 0 14.49 28.979 0.162 29.12 6 65.4 266.9 10 2 1 0 14.49 28.979 0.162 29.12 6 19.1 22.7 11 1 2 1 15.896 31.793 0.178 23.87 12 122.3 1526.9 12 2 1 1 15.896 31.793 0.178 23.87 12 83.4 710.1 13 1 1 2 16.056 32.113 0.18 23.36 12 77.8 605.8 14 3 0 0 16.482 32.963 0.184 22.08 6 130.2 801.2 15 2 0 2 16.996 33.992 0.19 20.65 12 50.7 227.2 16 3 0 1 17.747 35.493 0.198 18.79 12 24.0 46.3 17 2 2 0 19.123 38.246 0.213 15.95 6 6.2 1.3 18 1 2 2 19.577 39.154 0.217 15.14 12 15.7 15.9 19 2 1 2 19.577 39.154 0.217 15.14 12 24.9 40.1 20 1 3 0 19.936 39.872 0.221 14.54 6 43.2 58.0 21 3 1 0 19.936 39.872 0.221 14.54 6 106.8 355.1 22 2 2 1 20.245 40.489 0.225 14.05 12 32.0 61.6 23 1 0 3 20.329 40.659 0.226 13.92 12 12.1 8.7 24 1 3 1 21.022 42.043 0.233 12.92 12 25.1 34.8 25 3 1 1 21.022 42.043 0.233 12.92 12 30.8 52.3 26 3 0 2 21.148 42.296 0.234 12.74 12 0.7 0.0 27 1 1 3 21.856 43.711 0.242 11.84 12 50.3 128.2 28 4 0 0 22.227 44.454 0.246 11.4 6 57.1 79.4 29 2 0 3 22.588 45.175 0.249 10.99 12 37.8 67.1 30 4 0 1 23.225 46.451 0.256 10.32 12 8.2 3.0 31 2 2 2 23.342 46.684 0.257 10.2 12 95.6 398.6 32 1 3 2 24.038 48.077 0.264 9.54 12 38.2 59.6 33 3 1 2 24.038 48.077 0.264 9.54 12 60.5 149.4 34 2 3 0 24.344 48.688 0.268 9.27 6 10.7 2.3 35 3 2 0 24.344 48.688 0.268 9.27 6 46.1 42.2 36 1 2 3 24.681 49.362 0.271 8.99 12 118.4 539.7 37 2 1 3 24.681 49.362 0.271 8.99 12 75.5 219.3 38 2 3 1 25.278 50.556 0.277 8.51 12 77.9 221.2 39 3 2 1 25.278 50.556 0.277 8.51 12 65.7 157.3 40 1 4 0 25.682 51.363 0.281 8.21 6 62.2 67.9 41 4 1 0 25.682 51.363 0.281 8.21 6 87.5 134.5 42 3 0 3 26.006 52.011 0.285 7.98 12 19.2 12.6 43 4 0 2 26.043 52.086 0.285 7.95 12 92.6 291.8 44 0 0 4 26.47 52.94 0.289 7.66 2 223.0 271.8 45 1 4 1 26.581 53.163 0.29 7.59 12 23.6 18.0 46 4 1 1 26.581 53.163 0.29 7.59 12 13.3 5.8 47 1 0 4 27.107 54.214 0.296 7.26 12 2.0 0.1 48 2 2 3 27.908 55.816 0.304 6.8 12 9.5 2.6 49 2 3 2 27.944 55.888 0.304 6.78 12 46.1 61.5 50 3 2 2 27.944 55.888 0.304 6.78 12 7.5 1.6 51 5 0 0 28.219 56.438 0.307 6.63 6 32.0 14.5 52 1 1 4 28.351 56.702 0.308 6.56 12 0.3 0.0 53 1 3 3 28.523 57.046 0.31 6.47 12 31.7 27.8 54 3 1 3 28.523 57.046 0.31 6.47 12 25.8 18.4 55 2 0 4 28.96 57.92 0.314 6.25 12 6.5 1.1 56 5 0 1 29.065 58.13 0.315 6.2 12 26.8 19.0 57 1 4 2 29.164 58.329 0.316 6.15 12 6.2 1.0 58 4 1 2 29.164 58.329 0.316 6.15 12 27.6 20.1 59 3 3 0 29.432 58.865 0.319 6.03 6 13.6 2.4 60 2 4 0 30.027 60.055 0.325 5.76 6 19.8 4.8 61 4 2 0 30.027 60.055 0.325 5.76 6 78.6 76.2 62 3 3 1 30.257 60.513 0.327 5.66 12 65.6 104.4 63 4 0 3 30.32 60.64 0.328 5.64 12 4.2 0.4 64 1 2 4 30.741 61.482 0.332 5.47 12 32.7 25.1 65 2 1 4 30.741 61.482 0.332 5.47 12 41.0 39.4 66 2 4 1 30.842 61.684 0.333 5.43 12 8.1 1.5 67 4 2 1 30.842 61.684 0.333 5.43 12 42.9 42.7 68 5 0 2 31.516 63.032 0.339 5.18 12 90.4 181.1 69 1 5 0 31.772 63.544 0.342 5.08 6 44.1 21.2 70 5 1 0 31.772 63.544 0.342 5.08 6 1.0 0.0 71 3 0 4 31.895 63.79 0.343 5.04 12 72.7 114.1 72 2 3 3 32.055 64.11 0.345 4.99 12 78.7 132.3 73 3 2 3 32.055 64.11 0.345 4.99 12 30.5 19.9 74 1 5 1 32.561 65.123 0.349 4.82 12 75.6 117.8 75 5 1 1 32.561 65.123 0.349 4.82 12 32.1 21.3 76 3 3 2 32.655 65.309 0.35 4.79 12 33.1 22.4 77 1 4 3 33.184 66.368 0.355 4.63 12 30.2 18.0 78 4 1 3 33.184 66.368 0.355 4.63 12 26.6 14.0 79 2 4 2 33.216 66.432 0.356 4.62 12 31.6 19.7 80 4 2 2 33.216 66.432 0.356 4.62 12 27.1 14.5 81 2 2 4 33.585 67.169 0.359 4.51 12 12.2 2.9 82 1 3 4 34.139 68.277 0.364 4.36 12 9.8 1.8 83 3 1 4 34.139 68.277 0.364 4.36 12 25.6 12.3 84 1 0 5 34.412 68.823 0.367 4.29 12 7.7 1.1 85 6 0 0 34.57 69.14 0.368 4.25 6 9.3 0.8 86 1 5 2 34.873 69.747 0.371 4.18 12 36.2 23.4 87 5 1 2 34.873 69.747 0.371 4.18 12 30.3 16.5 88 3 4 0 35.117 70.233 0.373 4.12 6 16.6 2.4 89 4 3 0 35.117 70.233 0.373 4.12 6 0.8 0.0 90 6 0 1 35.328 70.656 0.375 4.07 12 15.4 4.1 91 5 0 3 35.386 70.772 0.376 4.05 12 14.4 3.6 92 1 1 5 35.503 71.006 0.377 4.03 12 4.5 0.4 93 4 0 4 35.776 71.551 0.379 3.97 12 43.1 31.5 94 3 4 1 35.869 71.738 0.38 3.95 12 67.6 77.1 95 4 3 1 35.869 71.738 0.38 3.95 12 13.2 3.0 96 2 0 5 36.043 72.086 0.382 3.91 12 6.5 0.7 97 2 5 0 36.199 72.397 0.383 3.88 6 58.0 27.9 98 5 2 0 36.199 72.397 0.383 3.88 6 16.4 2.2 99 3 3 3 36.465 72.93 0.386 3.82 12 30.5 15.2 100 2 5 1 36.942 73.884 0.39 3.73 12 46.1 33.9 101 5 2 1 36.942 73.884 0.39 3.73 12 44.5 31.6 102 2 4 3 36.999 73.999 0.391 3.72 12 6.1 0.6 103 4 2 3 36.999 73.999 0.391 3.72 12 63.3 63.7 104 2 3 4 37.382 74.764 0.394 3.65 12 5.5 0.5 105 3 2 4 37.382 74.764 0.394 3.65 12 24.8 9.6 106 6 0 2 37.562 75.123 0.396 3.62 12 31.3 15.1 107 1 2 5 37.645 75.29 0.396 3.6 12 72.4 80.9 108 2 1 5 37.645 75.29 0.396 3.6 12 52.8 42.9 109 3 4 2 38.091 76.181 0.4 3.53 12 8.0 1.0 110 4 3 2 38.091 76.181 0.4 3.53 12 38.4 22.3 111 1 6 0 38.326 76.652 0.403 3.49 6 55.3 22.9 112 6 1 0 38.326 76.652 0.403 3.49 6 44.5 14.8 113 1 4 4 38.439 76.878 0.404 3.47 12 45.1 30.2 114 4 1 4 38.439 76.878 0.404 3.47 12 72.6 78.4 115 1 5 3 38.587 77.173 0.405 3.45 12 71.4 75.2 116 5 1 3 38.587 77.173 0.405 3.45 12 12.9 2.5 117 3 0 5 38.7 77.399 0.406 3.43 12 9.8 1.4 118 1 6 1 39.055 78.11 0.409 3.38 12 36.1 18.8 119 6 1 1 39.055 78.11 0.409 3.38 12 27.0 10.5 120 2 5 2 39.141 78.283 0.41 3.37 12 26.6 10.2 121 5 2 2 39.141 78.283 0.41 3.37 12 75.4 82.0 122 2 2 5 40.266 80.532 0.42 3.22 12 25.8 9.2 123 5 0 4 40.528 81.055 0.422 3.19 12 44.7 27.2 124 1 3 5 40.785 81.57 0.424 3.16 12 15.4 3.2 125 3 1 5 40.785 81.57 0.424 3.16 12 23.2 7.3 126 4 4 0 40.934 81.869 0.425 3.15 6 71.9 34.8 127 6 0 3 41.191 82.382 0.427 3.12 12 6.8 0.6 128 1 6 2 41.221 82.442 0.428 3.11 12 17.9 4.2 129 6 1 2 41.221 82.442 0.428 3.11 12 36.9 18.2 130 3 5 0 41.451 82.903 0.43 3.09 6 40.4 10.8 131 5 3 0 41.451 82.903 0.43 3.09 6 39.4 10.3 132 7 0 0 41.451 82.903 0.43 3.09 6 9.9 0.6 133 3 3 4 41.562 83.125 0.431 3.08 12 18.4 4.5 134 4 4 1 41.652 83.304 0.431 3.07 12 33.1 14.4 135 3 4 3 41.707 83.415 0.432 3.07 12 69.9 64.1 136 4 3 3 41.707 83.415 0.432 3.07 12 5.2 0.4 137 0 0 6 41.959 83.918 0.434 3.04 2 133.9 38.9 138 2 4 4 42.078 84.156 0.435 3.03 12 43.7 24.7 139 4 2 4 42.078 84.156 0.435 3.03 12 52.0 35.1 140 3 5 1 42.167 84.335 0.436 3.02 12 11.7 1.8 141 5 3 1 42.167 84.335 0.436 3.02 12 9.0 1.1 142 7 0 1 42.167 84.335 0.436 3.02 12 7.6 0.7 143 4 0 5 42.333 84.667 0.437 3.01 12 11.0 1.6 144 1 0 6 42.474 84.948 0.438 3.0 12 26.6 9.1 145 2 5 3 42.737 85.474 0.441 2.97 12 44.0 24.6 146 5 2 3 42.737 85.474 0.441 2.97 12 40.8 21.2 147 2 6 0 42.996 85.992 0.443 2.95 6 5.7 0.2 148 6 2 0 42.996 85.992 0.443 2.95 6 25.6 4.1 149 1 1 6 43.501 87.002 0.447 2.92 12 64.7 52.3 150 1 5 4 43.62 87.24 0.448 2.91 12 50.9 32.3 151 5 1 4 43.62 87.24 0.448 2.91 12 0.1 0.0 152 2 6 1 43.709 87.418 0.449 2.9 12 2.7 0.1 153 6 2 1 43.709 87.418 0.449 2.9 12 21.2 5.6 154 4 4 2 43.794 87.587 0.449 2.9 12 38.7 18.5 155 2 3 5 43.874 87.748 0.45 2.89 12 49.7 30.6 156 3 2 5 43.874 87.748 0.45 2.89 12 48.0 28.5 157 2 0 6 44.014 88.028 0.451 2.88 12 9.0 1.0 158 3 5 2 44.306 88.613 0.453 2.87 12 73.3 65.9 159 5 3 2 44.306 88.613 0.453 2.87 12 60.2 44.5 160 7 0 2 44.306 88.613 0.453 2.87 12 30.6 11.5 161 1 6 3 44.789 89.578 0.457 2.84 12 15.4 2.9 162 6 1 3 44.789 89.578 0.457 2.84 12 27.4 9.1 163 1 4 5 44.899 89.799 0.458 2.83 12 14.9 2.7 164 4 1 5 44.899 89.799 0.458 2.83 12 8.8 0.9 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 1 0 1 8.404 16.808 5.27037 42.0 1.9 1.9 5.6 2 1 1 0 9.427 18.855 4.7026 199.8 8.9 9.0 5.6 3 2 0 0 10.903 21.805 4.07257 112.2 5.0 5.1 5.6 4 0 0 2 12.877 25.755 3.45625 954.5 42.7 42.9 5.6 5 1 0 2 14.011 28.021 3.18166 227.5 10.2 10.2 5.6 6 1 2 0 14.49 28.979 3.07857 289.5 12.9 13.0 5.6 7 1 2 1 15.896 31.793 2.81228 2237.0 100.0 100.0 5.6 8 1 1 2 16.056 32.113 2.78497 605.8 27.1 27.1 5.6 9 3 0 0 16.482 32.963 2.71505 801.2 35.8 35.8 5.6 10 2 0 2 16.996 33.992 2.63519 227.2 10.2 10.1 5.7 11 3 0 1 17.747 35.493 2.52711 46.3 2.1 2.1 5.7 12 2 1 2 19.577 39.154 2.29886 56.0 2.5 2.5 5.7 13 3 1 0 19.936 39.872 2.25906 413.1 18.5 18.3 5.7 14 2 2 1 20.245 40.489 2.22604 61.6 2.8 2.7 5.7 15 3 1 1 21.022 42.043 2.1473 87.1 3.9 3.9 5.7 16 1 1 3 21.856 43.711 2.06914 128.2 5.7 5.7 5.7 17 4 0 0 22.227 44.454 2.03629 79.4 3.5 3.5 5.7 18 2 0 3 22.588 45.175 2.00544 67.1 3.0 3.0 5.7 19 2 2 2 23.342 46.684 1.94408 398.6 17.8 17.6 5.7 20 3 1 2 24.038 48.077 1.89096 209.0 9.3 9.2 5.7 21 3 2 0 24.344 48.688 1.86862 44.4 2.0 2.0 5.7 22 1 2 3 24.681 49.362 1.8447 759.0 33.9 33.3 5.7 23 2 3 1 25.278 50.556 1.80388 378.5 16.9 16.6 5.8 24 4 1 0 25.682 51.363 1.77742 202.3 9.0 8.9 5.8 25 4 0 2 26.043 52.086 1.75443 291.8 13.0 12.8 5.8 26 0 0 4 26.47 52.94 1.72812 271.8 12.1 11.9 5.8 27 1 4 1 26.581 53.163 1.72142 23.8 1.1 1.0 5.8 28 2 3 2 27.944 55.888 1.64376 63.2 2.8 2.8 5.8 29 1 3 3 28.523 57.046 1.61311 46.2 2.1 2.0 5.8 30 4 2 0 30.027 60.055 1.53929 81.0 3.6 3.5 5.8 31 3 3 1 30.257 60.513 1.52872 104.4 4.7 4.5 5.8 32 2 1 4 30.741 61.482 1.50694 64.5 2.9 2.8 5.8 33 4 2 1 30.842 61.684 1.50249 44.2 2.0 1.9 5.8 34 5 0 2 31.516 63.032 1.47355 181.1 8.1 7.8 5.9 35 3 0 4 31.895 63.79 1.45786 114.1 5.1 4.9 5.9 36 2 3 3 32.055 64.11 1.45135 152.1 6.8 6.5 5.9 37 1 5 1 32.561 65.123 1.43121 139.1 6.2 6.0 5.9 38 3 3 2 32.655 65.309 1.42757 22.4 1.0 1.0 5.9 39 1 4 3 33.184 66.368 1.40735 32.1 1.4 1.4 5.9 40 2 4 2 33.216 66.432 1.40614 34.2 1.5 1.5 5.9 41 1 5 2 34.873 69.747 1.3472 39.9 1.8 1.7 5.9 42 4 0 4 35.776 71.551 1.31759 31.5 1.4 1.3 5.9 43 3 4 1 35.869 71.738 1.31461 80.1 3.6 3.4 5.9 44 2 5 0 36.199 72.397 1.30427 30.2 1.3 1.3 5.9 45 2 5 1 36.942 73.884 1.28165 65.5 2.9 2.8 6.0 46 4 2 3 36.999 73.999 1.27995 63.7 2.8 2.7 6.0 47 1 2 5 37.645 75.29 1.26117 123.9 5.5 5.2 6.0 48 1 6 0 38.326 76.652 1.24212 37.7 1.7 1.6 6.0 49 4 1 4 38.439 76.878 1.23903 108.6 4.9 4.6 6.0 50 1 5 3 38.587 77.173 1.23502 77.7 3.5 3.3 6.0 51 1 6 1 39.055 78.11 1.22254 29.3 1.3 1.2 6.0 52 5 2 2 39.141 78.283 1.22027 92.2 4.1 3.9 6.0 53 5 0 4 40.528 81.055 1.18538 27.2 1.2 1.1 6.1 54 4 4 0 40.934 81.869 1.17565 34.8 1.6 1.4 6.1 55 6 1 2 41.221 82.442 1.16893 22.4 1.0 0.9 6.1 56 3 4 3 41.707 83.415 1.15775 64.4 2.9 2.7 6.1 57 0 0 6 41.959 83.918 1.15208 38.9 1.7 1.6 6.1 58 4 2 4 42.078 84.156 1.14943 59.8 2.7 2.5 6.1 59 2 5 3 42.737 85.474 1.13504 45.8 2.0 1.9 6.1 60 1 1 6 43.501 87.002 1.11899 52.3 2.3 2.1 6.1 61 1 5 4 43.62 87.24 1.11656 32.3 1.4 1.3 6.2 62 2 3 5 43.874 87.748 1.11139 59.1 2.6 2.4 6.2 63 3 5 2 44.306 88.613 1.10277 121.9 5.5 5.0 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) |