29:
465:, with the spin magnetic moments of the Fe cations in the tetrahedral sites oriented in the opposite direction as those in the octahedral sites, and a net magnetization. It is a
394:
Common impurities include Cu, Ni, Zn, Mn, Cr, Sb and As. Ni impurities are of particular interest because the structural similarity between Ni-doped greigite and the
351:
The mineral typically appears as microscopic (< 0.03 mm) isometric hexoctahedral crystals and as minute sooty masses. Association minerals include
647:
861:
779:
Wang, Jun; Cao, Shi-He; Wu, Wei; Zhao, Guo-Meng (2011). "The Curie temperature and magnetic exchange energy in half-metallic greigite Fe
723:
285:
97:
846:
841:
566:
401:
present in biological enzymes has led to suggestions that greigite or similar minerals could have acted as catalysts for the
192:
215:
441:
Fd3m. The S anions form a cubic close-packed lattice, and the Fe cations occupy both tetrahedral and octahedral sites.
851:
836:
718:
Vaughan, D. J.; Craig, J. R. “Mineral
Chemistry of Metal Sulfides" Cambridge University Press, Cambridge: 1978.
395:
655:
856:
87:
28:
466:
337:
796:
753:
561:. Vol. I (Elements, Sulfides, Sulfosalts). Chantilly, VA, US: Mineralogical Society of America.
507:
345:
112:
470:
301:
205:
812:
525:
388:
719:
701:
693:
562:
159:
804:
761:
685:
515:
225:
64:
55:
736:
Devey, A.J.; Grau-Crespo, R.; Leeuw, N.H. (2009). "Electronic and magnetic structure of Fe
676:
Russell, Michael J.; Martin, William (2004). "The rocky roots of the acetyl-CoA pathway".
550:
Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C., eds. (1990).
352:
289:
51:
808:
800:
757:
511:
551:
469:, featuring both Fe(II) and Fe(III) centers in a 1:2 ratio. Both metal sites have high
402:
356:
333:
107:
830:
816:
529:
462:
182:
119:
330:
311:
622:
438:
142:
765:
689:
474:
422:
372:
364:
130:
697:
608:
450:
380:
368:
273:
705:
341:
520:
495:
340:
and sulfate-reducing bacteria. Greigite has also been identified in the
360:
326:
258:
593:
187:
Spheres of intergrown octahedra and as disseminated microscopic grains
434:
384:
376:
319:
323:
315:
307:
255:
621:
Skinner, Brian J.; Erd, Richard C.; Grimaldi, Frank S. (1964).
437:
structure. The crystallographic unit cell is cubic, with
288:, and named after the mineralogist and physical chemist
284:). It was first described in 1964 for an occurrence in
473:. The electronic structure of greigite is that of a
242:
234:
224:
214:
204:
191:
181:
173:
168:
158:
141:
118:
106:
96:
86:
63:
47:
42:
21:
623:"Greigite, the thio-spinel of iron; a new mineral"
421:thiocubane units of proteins of relevance to the
272:. It is the sulfur equivalent of the iron oxide
8:
648:"Armor-Plated Snail Discovered in Deep Sea"
177:Pale pink, tarnishes to metallic blue-black
545:
543:
541:
539:
27:
519:
604:
602:
589:
587:
585:
268:
264:
79:
75:
16:Iron sulfide mineral of spinel structure
486:
18:
7:
496:"IMA–CNMNC approved mineral symbols"
413:unit of greigite is found in the Fe
445:Magnetic and electronic properties
296:Natural occurrence and composition
261:mineral with the chemical formula
14:
286:San Bernardino County, California
164:a = 9.876 Ă…; Z = 8
329:rich clays. It is also found in
809:10.1088/0031-8949/83/04/045702
678:Trends in Biochemical Sciences
1:
405:. In particular, the cubic Fe
862:Minerals in space group 227
652:news.nationalgeographic.com
878:
766:10.1103/PhysRevB.79.195126
690:10.1016/j.tibs.2004.05.007
299:
336:. Greigite is formed by
26:
744:: GGA+U investigation".
847:Ferromagnetic materials
449:Like the related oxide
59:Spinel structural group
33:Greigite structure, SFe
559:Handbook of Mineralogy
500:Mineralogical Magazine
467:mixed-valence compound
338:magnetotactic bacteria
842:Iron(II,III) minerals
630:American Mineralogist
346:scaly-foot gastropods
235:Other characteristics
98:Strunz classification
658:on November 10, 2003
471:spin quantum numbers
801:2011PhyS...83d5702W
758:2009PhRvB..79s5126D
521:10.1180/mgm.2021.43
512:2021MinM...85..291W
494:Warr, L.N. (2021).
302:Iron-sulfur protein
210:Metallic to earthy
852:Magnetic minerals
746:Physical Review B
433:Greigite has the
429:Crystal structure
249:
248:
238:Strongly magnetic
869:
837:Thiospinel group
821:
820:
776:
770:
769:
733:
727:
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710:
709:
673:
667:
666:
664:
663:
654:. Archived from
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612:
606:
597:
591:
580:
579:
577:
575:
556:
547:
534:
533:
523:
491:
398:
271:
226:Specific gravity
197:
153:
136:
127:
124:Hexoctahedral (m
82:
70:
69:(repeating unit)
56:Thiospinel group
31:
19:
877:
876:
872:
871:
870:
868:
867:
866:
827:
826:
825:
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789:Physica Scripta
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743:
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675:
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592:
583:
573:
571:
569:
554:
549:
548:
537:
493:
492:
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483:
461:), greigite is
460:
456:
447:
431:
420:
416:
412:
408:
396:
353:montmorillonite
310:sediments with
304:
298:
290:Joseph W. Greig
283:
279:
270:
266:
262:
195:
151:
134:
129:
125:
81:
77:
73:
68:
67:
58:
54:
52:Sulfide mineral
38:
36:
17:
12:
11:
5:
875:
873:
865:
864:
859:
857:Cubic minerals
854:
849:
844:
839:
829:
828:
823:
822:
784:
780:
771:
752:(19): 195126.
741:
737:
728:
711:
684:(7): 358–363.
668:
639:
613:
598:
581:
567:
535:
506:(3): 291–320.
485:
484:
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479:
458:
454:
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430:
427:
418:
414:
410:
406:
403:origin of life
297:
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169:Identification
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139:
138:
122:
116:
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108:Crystal system
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94:
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84:
83:
71:
61:
60:
49:
45:
44:
40:
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32:
24:
23:
15:
13:
10:
9:
6:
4:
3:
2:
874:
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850:
848:
845:
843:
840:
838:
835:
834:
832:
818:
814:
810:
806:
802:
798:
795:(4): 045702.
794:
790:
775:
772:
767:
763:
759:
755:
751:
747:
732:
729:
725:
724:0-521-21489-0
721:
715:
712:
707:
703:
699:
695:
691:
687:
683:
679:
672:
669:
657:
653:
649:
643:
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635:
631:
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605:
603:
599:
595:
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588:
586:
582:
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564:
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546:
544:
542:
540:
536:
531:
527:
522:
517:
513:
509:
505:
501:
497:
490:
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480:
478:
476:
472:
468:
464:
463:ferrimagnetic
452:
444:
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436:
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404:
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392:
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386:
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343:
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335:
332:
328:
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321:
317:
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309:
306:It occurs in
303:
295:
293:
292:(1895–1977).
291:
287:
275:
260:
257:
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183:Crystal habit
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149:
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132:
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120:Crystal class
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72:
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57:
53:
50:
46:
41:
30:
25:
20:
792:
788:
774:
749:
745:
731:
714:
681:
677:
671:
660:. Retrieved
656:the original
651:
642:
633:
629:
616:
611:. Webmineral
596:. Mindat.org
572:. Retrieved
558:
503:
499:
489:
448:
432:
393:
350:
331:hydrothermal
320:arkosic sand
305:
251:
250:
147:
574:December 5,
439:space group
216:Diaphaneity
143:Space group
831:Categories
662:2016-08-29
568:0962209708
552:"Greigite"
481:References
475:half metal
423:acetyl-CoA
373:sphalerite
365:colemanite
308:lacustrine
300:See also:
243:References
193:Mohs scale
131:H-M symbol
88:IMA symbol
37:tetrahedra
817:121375069
698:0968-0004
636:: 543–55.
530:235729616
451:magnetite
425:pathway.
381:marcasite
369:veatchite
342:sclerites
322:often in
274:magnetite
160:Unit cell
706:15236743
609:Greigite
594:Greigite
399:clusters
397:(Fe,Ni)S
389:dolomite
357:chlorite
252:Greigite
200:4 to 4.5
196:hardness
48:Category
22:Greigite
797:Bibcode
754:Bibcode
508:Bibcode
361:calcite
327:sulfide
259:sulfide
133:: (4/m
102:2.DA.05
65:Formula
43:General
815:
722:
704:
696:
565:
528:
435:spinel
385:galena
377:pyrite
324:varved
254:is an
220:Opaque
206:Luster
813:S2CID
626:(PDF)
555:(PDF)
526:S2CID
334:veins
316:silts
312:clays
230:4.049
174:Color
113:Cubic
720:ISBN
702:PMID
694:ISSN
576:2011
563:ISBN
387:and
318:and
263:FeFe
256:iron
137:2/m)
74:FeFe
805:doi
787:".
762:doi
686:doi
516:doi
453:(Fe
348:.
344:of
276:(Fe
128:m)
92:Grg
833::
811:.
803:.
793:83
791:.
760:.
750:79
748:.
700:.
692:.
682:29
680:.
650:.
634:49
632:.
628:.
601:^
584:^
557:.
538:^
524:.
514:.
504:85
502:.
498:.
477:.
391:.
383:,
379:,
375:,
371:,
367:,
363:,
359:,
355:,
314:,
819:.
807::
799::
785:4
783:S
781:3
768:.
764::
756::
742:4
740:S
738:3
726:.
708:.
688::
665:.
578:.
532:.
518::
510::
459:4
457:O
455:3
419:4
417:S
415:4
411:4
409:S
407:4
282:4
280:O
278:3
269:4
267:S
265:2
154:m
152:3
150:d
148:F
135:3
126:3
80:4
78:S
76:2
35:4
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