633:
359:. The original formula was extended to show the presence of cyclic silicate groups and presence of silicon at the M4 site, according to the nomenclature of eudialyte group. When compared to other minerals of the group, feklichevite characterizes in the presence of ferric iron (thus similar to
617:
Johnsen, O., Ferraris, G., Gault, R.A., Grice, D.G., Kampf, A.R., and Pekov, I.V., 2003. The nomenclature of eudialyte-group minerals. The
Canadian Mineralogist 41, 785–794
674:
371:) and dominance of calcium at the N4 site. Calcium is ordered in the structure and is also present at the M1 site. Other iron-bearing minerals of the group are
605:, a new mineral of the eudialyte group from Kovdor Massif, Kola peninsula. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 130(3), 55–65
728:
667:
581:
Pekov, I.V., Ekimenkova, I.A., Chukanov, N.V., Rastsvetaeva, R.K., Kononkova, N.N., Pekova, N.A., and Zadov, A.E., 2001. Feklichevite Na
90:
733:
708:
660:
202:
399:, but they rather contain ferrous iron Feklichevite name honors Russian mineralogist and crystallographer, V. G. Feklichev.
235:
713:
723:
100:
718:
703:
698:
693:
80:
192:
516:
225:
215:
534:
376:
182:
447:
149:
644:
640:
524:
380:
263:
42:
632:
316:
520:
396:
110:
687:
538:
172:
122:
35:
388:
384:
368:
286:
283:
273:
137:
427:
408:
364:
129:
483:
471:
459:
435:
392:
372:
475:
463:
443:
439:
431:
423:
419:
360:
115:
529:
504:
559:
467:
411:
245:
479:
415:
418:
alkaline massif, Kola
Peninsula, Russia. Feklichevite coexists with
154:
a = 14.26, c = 30.17 (approximated); Z = 3
648:
303:
295:
282:
272:
262:
254:
244:
234:
224:
214:
201:
191:
181:
171:
163:
158:
148:
136:
121:
109:
99:
89:
79:
41:
31:
26:
21:
668:
8:
414:vein of pegmatoid type, that occurs in the
675:
661:
458:Feklichevite has quite high admixtures of
528:
613:
611:
554:
552:
550:
548:
495:
577:
575:
573:
571:
569:
567:
18:
7:
629:
627:
560:http://www.mindat.org/min-11029.html
505:"IMA–CNMNC approved mineral symbols"
268:nω = 1.61, nε = 1.61 (approximated)
647:. You can help Knowledge (XXG) by
14:
631:
177:Isometric, thick-tabular; grains
639:This article about a specific
16:Mineral of the eudialyte group
1:
729:Minerals in space group 160
750:
626:
407:Feklichevite was found in
403:Occurrence and association
240:Transparent or translucent
127:Ditrigonal pyramidal (3m)
315:is a rare mineral of the
734:Silicate mineral stubs
558:Mindat, Feklichevite,
509:Mineralogical Magazine
709:Iron(II,III) minerals
91:Strunz classification
530:10.1180/mgm.2021.43
521:2021MinM...85..291W
503:Warr, L.N. (2021).
319:with the formula Na
250:2.87 (approximated)
101:Dana classification
714:Zirconium minerals
454:Notes on chemistry
377:ferrokentbrooksite
255:Optical properties
724:Trigonal minerals
656:
655:
310:
309:
296:Common impurities
741:
719:Niobium minerals
704:Calcium minerals
677:
670:
663:
641:silicate mineral
635:
628:
618:
615:
606:
579:
562:
556:
543:
542:
532:
500:
381:georgbarsanovite
264:Refractive index
207:
48:
47:(repeating unit)
19:
749:
748:
744:
743:
742:
740:
739:
738:
699:Sodium minerals
684:
683:
682:
681:
624:
622:
621:
616:
609:
604:
600:
596:
592:
588:
584:
580:
565:
557:
546:
502:
501:
497:
492:
456:
405:
358:
354:
350:
346:
342:
338:
334:
330:
326:
322:
317:eudialyte group
205:
128:
75:(original form)
74:
70:
66:
62:
58:
54:
46:
45:
17:
12:
11:
5:
747:
745:
737:
736:
731:
726:
721:
716:
711:
706:
701:
696:
694:Cyclosilicates
686:
685:
680:
679:
672:
665:
657:
654:
653:
636:
620:
619:
607:
602:
598:
594:
590:
586:
582:
563:
544:
515:(3): 291–320.
494:
493:
491:
488:
455:
452:
404:
401:
397:rastsvetaevite
356:
352:
348:
344:
340:
336:
332:
328:
324:
320:
308:
307:
305:
301:
300:
297:
293:
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289:
280:
279:
276:
270:
269:
266:
260:
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256:
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228:
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212:
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208:
199:
198:
195:
189:
188:
187:(001), perfect
185:
179:
178:
175:
169:
168:
165:
161:
160:
159:Identification
156:
155:
152:
146:
145:
140:
134:
133:
125:
119:
118:
113:
111:Crystal system
107:
106:
103:
97:
96:
93:
87:
86:
83:
77:
76:
72:
68:
64:
60:
56:
52:
49:
39:
38:
33:
29:
28:
24:
23:
15:
13:
10:
9:
6:
4:
3:
2:
746:
735:
732:
730:
727:
725:
722:
720:
717:
715:
712:
710:
707:
705:
702:
700:
697:
695:
692:
691:
689:
678:
673:
671:
666:
664:
659:
658:
652:
650:
646:
642:
637:
634:
630:
625:
614:
612:
608:
578:
576:
574:
572:
570:
568:
564:
561:
555:
553:
551:
549:
545:
540:
536:
531:
526:
522:
518:
514:
510:
506:
499:
496:
489:
487:
485:
481:
477:
473:
469:
466:, with minor
465:
461:
453:
451:
449:
445:
441:
437:
433:
429:
425:
421:
417:
413:
410:
402:
400:
398:
394:
390:
386:
382:
378:
374:
370:
366:
362:
318:
314:
306:
302:
298:
294:
290:
288:
285:
281:
277:
275:
271:
267:
265:
261:
257:
253:
249:
247:
243:
239:
237:
233:
229:
227:
223:
219:
217:
213:
209:
204:
200:
196:
194:
190:
186:
184:
180:
176:
174:
173:Crystal habit
170:
166:
162:
157:
153:
151:
147:
144:
141:
139:
135:
131:
126:
124:
123:Crystal class
120:
117:
114:
112:
108:
104:
102:
98:
94:
92:
88:
84:
82:
78:
50:
44:
40:
37:
36:Cyclosilicate
34:
30:
25:
20:
649:expanding it
638:
623:
512:
508:
498:
457:
406:
389:labyrinthite
385:khomyakovite
369:fengchengite
313:Feklichevite
312:
311:
287:fluorescence
258:Uniaxial (+)
142:
22:Feklichevite
430:, potassic
284:Ultraviolet
274:Pleochroism
236:Diaphaneity
138:Space group
688:Categories
490:References
448:руrrhоtitе
428:cancrinite
409:cancrinite
365:mogovidite
304:References
203:Mohs scale
167:Dark brown
130:H-M symbol
81:IMA symbol
539:235729616
484:lanthanum
472:strontium
460:manganese
436:pectolite
393:oneillite
373:eudialyte
150:Unit cell
476:titanium
464:fluorine
444:hematite
440:titanite
432:feldspar
424:diopside
420:aegirine
361:ikranite
230:Brownish
220:Vitreous
206:hardness
193:Tenacity
183:Cleavage
116:Trigonal
32:Category
601:O,Cl,O)
597:Nb(OH,H
589:(Fe,Fe)
517:Bibcode
468:hafnium
412:syenite
335:NbSi(Si
327:(Fe,Fe)
246:Density
197:Brittle
105:64.1.7.
95:9.CO.10
71:O,Cl,O)
67:Nb(OH,H
59:(Fe,Fe)
43:Formula
27:General
537:
482:, and
480:cerium
446:, and
416:Kovdor
226:Streak
216:Luster
132:: (3m)
643:is a
535:S2CID
299:Mn, F
164:Color
645:stub
462:and
395:and
367:and
278:None
525:doi
347:(Si
210:5.5
143:R3m
85:Fek
690::
610:^
593:Zr
585:Ca
583:11
566:^
547:^
533:.
523:.
513:85
511:.
507:.
486:.
478:,
474:,
470:,
450:.
442:,
438:,
434:,
426:,
391:,
387:,
383:,
379:,
375:,
363:,
353:27
331:Zr
323:Ca
321:11
291:No
63:Zr
55:Ca
53:11
51:Na
676:e
669:t
662:v
651:.
603:5
599:2
595:3
591:2
587:9
541:.
527::
519::
422:-
357:2
355:)
351:O
349:9
345:2
343:)
341:9
339:O
337:3
333:3
329:2
325:9
73:5
69:2
65:3
61:2
57:9
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