410:
29:
387:, in which the iron is present as the ion Fe. In the aegirine–augite series, the sodium is variably replaced by calcium with iron(II) and magnesium replacing the iron(III) to balance the charge. Aluminum also substitutes for the iron(III).
549:
The acmite variety was first described in 1821, at
Kongsberg, Norway, and the aegirine variety in 1835 for an occurrence in Rundemyr, Øvre Eiker, Buskerud, Norway. Aegirine was named after
409:
727:
757:
807:
797:
693:
92:
399:
233:
266:
792:
782:
331:
X = emerald green, deep green; Y = grass-green, deep green, yellow; Z = brownish green, green, yellowish brown, yellow
28:
777:
787:
82:
772:
527:
414:
223:
213:
610:
346:
256:
246:
802:
628:
507:
199:
689:
444:
421:
372:
144:
618:
577:
403:
294:
276:
189:
58:
47:
554:
614:
184:
Prismatic crystals may be in sprays of acicular crystals, fibrous, in radial concretions
648:
562:
523:
102:
721:
766:
632:
484:
316:
179:
114:
476:
448:
433:
161:
500:
488:
480:
425:
326:
132:
472:
395:
123:
107:
673:
519:
515:
496:
492:
468:
452:
429:
539:
531:
464:
368:
336:
51:
623:
598:
550:
543:
511:
440:
436:
398:
prismatic crystals. It has a glassy luster and perfect cleavage. Its
376:
662:
565:ἀκμή "point, edge") in reference to the typical pointed crystals.
535:
456:
408:
460:
720:
16:
Member of the clinopyroxene group of inosilicate mineral
420:
This mineral commonly occurs in alkalic igneous rocks,
33:
Aegirine (dark) with minor feldspar (light) from Malawi
375:
minerals. It is the sodium endmember of the aegirine–
709:(7th ed.). Philadelphia, PA: Durrie & Peck.
355:
345:
335:
325:
315:
293:
285:
275:
265:
255:
245:
232:
222:
212:
198:
188:
178:
170:
160:
155:
143:
131:
113:
101:
91:
81:
57:
43:
38:
21:
731:. Vol. 1 (11th ed.). 1911. p. 149.
684:Hurlbut, Cornelius S.; Klein, Cornelis, 1985,
557:god of the sea. A synonym for the mineral is
151:c = 5.294 , β = 107.42°; Z = 4
8:
341:Measured: 60° to 90°, Calculated: 68° to 84°
194:Simple and lamellar twinning common on {100}
455:. It may occur as an authigenic mineral in
644:
642:
379:series. It has the chemical formula NaFeSi
622:
463:. It occurs in association with potassic
658:
656:
73:
69:
589:
413:Syenite with aegirine and acmite from
18:
7:
599:"IMA–CNMNC approved mineral symbols"
568:It is sometimes used as a gemstone.
391:is a fibrous green-colored variety.
14:
432:. It also appears in regionally
27:
742:Dictionary of Gems and Gemology
744:By Mohsen Manutchehr-Danai p.5
394:Aegirine occurs as dark green
1:
251:Vitreous to slightly resinous
705:Dana, James Dwight (1855) .
402:varies from 5 to 6 and its
351:moderate to strong r > v
824:
808:Minerals described in 1821
798:Minerals in space group 15
443:, and iron formations; in
174:Dark Green, Greenish Black
208:0) ≈87°; parting on {100}
204:Good on {110}, (110) ^ (1
26:
406:is between 3.2 and 3.4.
367:is a member of the clino
728:Encyclopædia Britannica
447:rocks, and from sodium
649:Handbook of Mineralogy
603:Mineralogical Magazine
518:, Norway; Narsarssuk,
417:
415:Magnet Cove, Arkansas
412:
271:Translucent to opaque
149:a = 9.658, b = 8.795
93:Strunz classification
707:Manual of Mineralogy
686:Manual of Mineralogy
793:Monoclinic minerals
624:10.1180/mgm.2021.43
615:2021MinM...85..291W
597:Warr, L.N. (2021).
506:Localities include
783:Iron(III) minerals
508:Mont Saint-Hilaire
422:nepheline syenites
418:
286:Optical properties
758:Mineral Galleries
445:blueschist facies
362:
361:
321:δ = 0.037 – 0.061
307:= 1.740 – 1.819 n
303:= 1.720 – 1.778 n
127:
815:
745:
739:
733:
732:
724:
717:
711:
710:
702:
696:
682:
676:
671:
665:
660:
651:
646:
637:
636:
626:
594:
578:List of minerals
404:specific gravity
295:Refractive index
277:Specific gravity
238:
207:
121:
119:Prismatic (2/m)
77:
64:
63:(repeating unit)
48:Silicate mineral
31:
19:
823:
822:
818:
817:
816:
814:
813:
812:
778:Sodium minerals
763:
762:
754:
749:
748:
740:
736:
719:
718:
714:
704:
703:
699:
683:
679:
672:
668:
661:
654:
647:
640:
596:
595:
591:
586:
574:
386:
382:
311:= 1.757 – 1.839
310:
306:
302:
236:
205:
150:
120:
75:
71:
67:
62:
61:
34:
17:
12:
11:
5:
821:
819:
811:
810:
805:
800:
795:
790:
788:Pyroxene group
785:
780:
775:
765:
764:
761:
760:
753:
752:External links
750:
747:
746:
734:
722:"Acmite"
712:
697:
677:
666:
652:
638:
609:(3): 291–320.
588:
587:
585:
582:
581:
580:
573:
570:
524:Kola Peninsula
384:
380:
360:
359:
357:
353:
352:
349:
343:
342:
339:
333:
332:
329:
323:
322:
319:
313:
312:
308:
304:
300:
297:
291:
290:
287:
283:
282:
279:
273:
272:
269:
263:
262:
261:Yellowish-grey
259:
253:
252:
249:
243:
242:
239:
230:
229:
226:
220:
219:
216:
210:
209:
202:
196:
195:
192:
186:
185:
182:
176:
175:
172:
168:
167:
164:
158:
157:
156:Identification
153:
152:
147:
141:
140:
135:
129:
128:
117:
111:
110:
105:
103:Crystal system
99:
98:
95:
89:
88:
85:
79:
78:
65:
55:
54:
45:
41:
40:
36:
35:
32:
24:
23:
15:
13:
10:
9:
6:
4:
3:
2:
820:
809:
806:
804:
801:
799:
796:
794:
791:
789:
786:
784:
781:
779:
776:
774:
771:
770:
768:
759:
756:
755:
751:
743:
738:
735:
730:
729:
723:
716:
713:
708:
701:
698:
695:
694:0-471-80580-7
691:
687:
681:
678:
675:
670:
667:
664:
659:
657:
653:
650:
645:
643:
639:
634:
630:
625:
620:
616:
612:
608:
604:
600:
593:
590:
583:
579:
576:
575:
571:
569:
566:
564:
560:
556:
552:
547:
545:
541:
537:
533:
529:
525:
521:
517:
513:
509:
504:
502:
498:
494:
490:
486:
485:astrophyllite
482:
478:
474:
470:
466:
462:
458:
454:
450:
446:
442:
438:
435:
434:metamorphosed
431:
427:
423:
416:
411:
407:
405:
401:
400:Mohs hardness
397:
392:
390:
378:
374:
370:
366:
358:
354:
350:
348:
344:
340:
338:
334:
330:
328:
324:
320:
318:
317:Birefringence
314:
298:
296:
292:
288:
284:
280:
278:
274:
270:
268:
264:
260:
258:
254:
250:
248:
244:
240:
235:
231:
227:
225:
221:
217:
215:
211:
203:
201:
197:
193:
191:
187:
183:
181:
180:Crystal habit
177:
173:
169:
165:
163:
159:
154:
148:
146:
142:
139:
136:
134:
130:
125:
118:
116:
115:Crystal class
112:
109:
106:
104:
100:
96:
94:
90:
86:
84:
80:
66:
60:
56:
53:
49:
46:
42:
37:
30:
25:
20:
773:Inosilicates
741:
737:
726:
715:
706:
700:
688:, 20th ed.,
685:
680:
669:
606:
602:
592:
567:
558:
548:
505:
477:arfvedsonite
449:metasomatism
426:carbonatites
419:
393:
388:
364:
363:
166:231.00 g/mol
162:Formula mass
137:
528:Magnet Cove
501:apophyllite
489:catapleiite
481:aenigmatite
373:inosilicate
327:Pleochroism
289:Biaxial (−)
267:Diaphaneity
133:Space group
68:NaFe[Si
767:Categories
674:Webmineral
584:References
526:, Russia;
514:, Canada;
473:riebeckite
453:granulites
430:pegmatites
396:monoclinic
356:References
347:Dispersion
234:Mohs scale
124:H-M symbol
108:Monoclinic
83:IMA symbol
803:Gemstones
633:235729616
520:Greenland
516:Kongsberg
497:serandite
493:eudialyte
469:nepheline
371:group of
281:3.50–3.60
145:Unit cell
572:See also
540:Scotland
532:Arkansas
465:feldspar
441:gneisses
369:pyroxene
365:Aegirine
337:2V angle
237:hardness
224:Tenacity
214:Fracture
200:Cleavage
190:Twinning
52:pyroxene
44:Category
22:Aegirine
611:Bibcode
544:Nigeria
437:schists
228:Brittle
97:9.DA.25
59:Formula
39:General
692:
663:Mindat
631:
561:(from
559:acmite
553:, the
534:, US;
512:Quebec
457:shales
389:Acmite
377:augite
257:Streak
247:Luster
218:Uneven
122:(same
629:S2CID
563:Greek
555:Norse
536:Kenya
461:marls
171:Color
690:ISBN
551:Ægir
542:and
499:and
459:and
428:and
138:C2/c
619:doi
451:in
87:Aeg
769::
725:.
655:^
641:^
627:.
617:.
607:85
605:.
601:.
546:.
538:;
530:,
522:;
510:,
503:.
495:,
491:,
487:,
483:,
479:,
475:,
471:,
467:,
439:,
424:,
50:,
635:.
621::
613::
385:6
383:O
381:2
309:γ
305:β
301:α
299:n
241:6
206:1
126:)
76:]
74:6
72:O
70:2
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
