624:
752:
586:, principally Mg, and one tenth of the tetrahedral sites are filled by Si. There are three distinct octahedra in the array: Fe is ordered in the M1 sites but not in the larger M2 and smaller M3 sites. Ti is ordered in the M3 positions, which are the smallest, but Ti concentration appears never to exceed 0.5 atoms Ti per formula unit in natural specimens. In the humite series Mg is replaced by Fe, Mn, Ca and Zn in that order of abundance, though Mg always predominates.
33:
671:= 1.619 – 1.675, birefringence = 0.025 – 0.037, and 2V measured as 64° to 90°, calculated: 76° to 78°. Refractive indices tend to increase from norbergite to clinohumite in the humite group. They also increase with Fe and Ti and with (OH) substituting for F. Dispersion: r > v.
623:
515:, molar mass 351.6 g. There is usually some OH in the F sites, however, and Fe and Ti can substitute for Mg, so the formula for the naturally occurring mineral is better written
639:
Chondrodite is yellow, orange, red or brown, or rarely colorless, but zoning of different color intensity is common, and intergrown plates of chondrodite, humite, clinohumite,
1000:
The usually granular occurrence in the limestone of Pargas in
Finland was described by D'OHSSON (Vet. Akad. Handl. Stockh. 1817, 206) after χονδρος "granule" as chondrodite
582:
octahedra. Chains are staggered so that none of the independent tetrahedral sites occupied by Si has OH or F corners. Half of the octahedral sites are filled by divalent
780:
512:
615:
Natural chondrodite has a = 7.867 to 7.905 Å, b = 4.727 to 4.730 Å, c = 10.255 to 10.318 Å, beta = 109.0 to 109.33. Z = 2.
1147:
993:
1053:
116:
259:
1152:
292:
1142:
1127:
710:, and is stable over a range of temperatures and pressures that include those existing in a portion of the uppermost
882:
130:
106:
1132:
563:
442:
1137:
757:
249:
239:
1054:"Petrogenesis of Ultramafic Metamorphic Rocks from the 3800 Ma Isua Supracrustal Belt, West Greenland"
382:
Some specimens fluoresce orange yellow under shortwave and orange under longwave UV. Not radioactive.
1096:
817:
1085:"Dunites from Isua, Greenland: A ca. 3720 Ma window into subcrustal metasomatism of depleted mantle"
282:
272:
835:
656:
632:
229:
1061:
989:
465:
in
Finland, and named from the Greek for "granule", which is a common habit for this mineral.
399:
48:
611:
Synthetic OH end member a = 7.914 Å, b = 4.752 Å, c = 10.350 Å, beta = 108.71.
1104:
981:
825:
785:
711:
441:. Although it is a fairly rare mineral, it is the most frequently encountered member of the
320:
302:
219:
55:
948:
450:
1100:
821:
725:
684:
140:
1121:
839:
342:
214:
Typically anhedral masses or grains, or as plates flattened on {010}, {001} or {100}.
209:
152:
1084:
770:
721:
680:
644:
458:
446:
191:
570:
O, OH and F with metal ions in the octahedral sites resulting in zigzag chains of
32:
765:
692:
352:
170:
930:
985:
747:
737:
640:
605:
362:
224:
Simple or multiple twinning common on {001}, also reported on {105} and {305}.
161:
145:
733:
729:
628:
599:
17:
863:
Phillips, W R and
Griffen, D T (1981) Optical Mineralogy, pages 142 to 144
717:
688:
830:
805:
696:
583:
912:
1108:
775:
567:
462:
357:
X golden yellow to orange, Y and Z light yellow to almost colorless
622:
608:
a = 7.80 Å, b = 4.75 Å, c = 10.27 Å, beta = 109.2.
454:
902:
Gaines et al (1997) Dana's New
Mineralogy Eighth Edition, Wiley
562:
The chondrodite structure is based on a slightly distorted
1012:
720:
chondrodite has been found as inclusions in olivine in
1013:"IMA Mineral List with Database of Mineral Properties"
1043:
Physics and
Chemistry of Minerals (1999) 26: 297-303
728:, where it is associated with clinohumite, olivine,
872:
European
Journal of Mineralogy (2002) 14: 1027-1032
386:
378:
361:
351:
341:
319:
311:
301:
291:
281:
271:
258:
248:
238:
228:
218:
208:
200:
190:
185:
169:
151:
139:
129:
115:
105:
54:
44:
39:
25:
976:Hintze, C. (31 December 1897). "Humitgruppe".
204:Yellow, orange, red or brown, rarely colorless
695:processes. It is formed by the hydration of
8:
1025:American Mineralogist (1970): 55: 1182-1194
511:is the end member formula as given by the
859:
857:
855:
853:
851:
849:
829:
706:
702:
687:and acidic or alkaline intrusions where
796:
513:International Mineralogical Association
898:
896:
22:
1083:Friend, C.R.L.; Nutman, A.P. (2011).
736:and Ni-Co-Pb sulfides in a matrix of
7:
1034:American Mineralogist (1979) 64:1027
806:"IMA–CNMNC approved mineral symbols"
449:deposits from locally metamorphosed
453:. It is also found associated with
14:
750:
679:Chondrodite is found largely in
655:Chondrodite is biaxial(+), with
31:
461:. It was discovered in 1817 at
1:
445:of minerals. It is formed in
1058:petrology.oxfordjournals.org
1169:
1148:Minerals in space group 14
931:"Chondrodite Mineral Data"
781:Classification of minerals
15:
986:10.1515/9783112361047-011
30:
16:Not to be confused with
691:has been introduced by
659:variously reported as n
124:8/B.04-20 (8th edition)
121:9.AF.45 (10th edition)
810:Mineralogical Magazine
683:contact zones between
636:
631:, Tilly Foster mine,
564:hexagonal close packed
978:Silicate und Titanate
758:Earth sciences portal
626:
379:Other characteristics
234:Poor to good on (001)
117:Strunz classification
1153:Luminescent minerals
1064:on 20 September 2013
647:have been reported.
400:nesosilicate mineral
367:Soluble in HCl and H
244:Conchoidal to uneven
1143:Monoclinic minerals
1101:2011Geo....39..663F
831:10.1180/mgm.2021.43
822:2021MinM...85..291W
804:Warr, L.N. (2021).
131:Dana classification
1128:Magnesium minerals
667:= 1.602 – 1.655, n
663:= 1.592 – 1.643, n
657:refractive indices
651:Optical properties
637:
633:Brewster, New York
333:= 1.602 – 1.655, n
329:= 1.592 – 1.643, n
312:Optical properties
277:Vitreous to greasy
627:Chondrodite with
393:
392:
165:
125:
1160:
1113:
1112:
1109:10.1130/G31904.1
1080:
1074:
1073:
1071:
1069:
1060:. Archived from
1050:
1044:
1041:
1035:
1032:
1026:
1023:
1017:
1016:
1009:
1003:
1002:
973:
967:
966:
964:
962:
953:
945:
939:
938:
927:
921:
920:
909:
903:
900:
891:
890:
879:
873:
870:
864:
861:
844:
843:
833:
801:
786:List of minerals
760:
755:
754:
753:
709:
581:
580:
579:
553:
552:
551:
543:
542:
534:
533:
525:
524:
510:
509:
508:
500:
499:
491:
490:
482:
481:
440:
439:
438:
430:
429:
421:
420:
412:
411:
337:= 1.619 – 1.675,
321:Refractive index
303:Specific gravity
264:
159:
157:Prismatic (2/m)
123:
101:
100:
99:
91:
90:
82:
81:
73:
72:
61:
60:(repeating unit)
35:
23:
1168:
1167:
1163:
1162:
1161:
1159:
1158:
1157:
1118:
1117:
1116:
1082:
1081:
1077:
1067:
1065:
1052:
1051:
1047:
1042:
1038:
1033:
1029:
1024:
1020:
1011:
1010:
1006:
996:
975:
974:
970:
960:
958:
951:
947:
946:
942:
929:
928:
924:
911:
910:
906:
901:
894:
887:Mineralienatlas
881:
880:
876:
871:
867:
862:
847:
803:
802:
798:
794:
756:
751:
749:
746:
708:
704:
700:
685:carbonate rocks
677:
670:
666:
662:
653:
621:
612:
603:
597:
594:Space group: P2
592:
578:
575:
574:
573:
571:
560:
550:
547:
546:
545:
541:
538:
537:
536:
532:
529:
528:
527:
523:
520:
519:
518:
516:
507:
504:
503:
502:
498:
495:
494:
493:
489:
486:
485:
484:
480:
477:
476:
475:
473:
471:
437:
434:
433:
432:
428:
425:
424:
423:
419:
416:
415:
414:
410:
407:
406:
405:
403:
374:
370:
336:
332:
328:
262:
180:
158:
122:
98:
95:
94:
93:
89:
86:
85:
84:
80:
77:
76:
75:
71:
68:
67:
66:
64:
59:
58:
21:
12:
11:
5:
1166:
1164:
1156:
1155:
1150:
1145:
1140:
1135:
1130:
1120:
1119:
1115:
1114:
1095:(7): 663–666.
1075:
1045:
1036:
1027:
1018:
1004:
994:
968:
940:
922:
904:
892:
874:
865:
845:
816:(3): 291–320.
795:
793:
790:
789:
788:
783:
778:
773:
768:
762:
761:
745:
742:
726:West Greenland
676:
673:
668:
664:
660:
652:
649:
620:
617:
595:
591:
588:
576:
559:
556:
548:
539:
530:
521:
505:
496:
487:
478:
470:
467:
435:
426:
417:
408:
391:
390:
388:
384:
383:
380:
376:
375:
372:
368:
365:
359:
358:
355:
349:
348:
345:
339:
338:
334:
330:
326:
323:
317:
316:
313:
309:
308:
305:
299:
298:
295:
289:
288:
287:Grey or yellow
285:
279:
278:
275:
269:
268:
265:
256:
255:
252:
246:
245:
242:
236:
235:
232:
226:
225:
222:
216:
215:
212:
206:
205:
202:
198:
197:
194:
188:
187:
186:Identification
183:
182:
178:
173:
167:
166:
155:
149:
148:
143:
141:Crystal system
137:
136:
133:
127:
126:
119:
113:
112:
109:
103:
102:
96:
87:
78:
69:
62:
52:
51:
46:
42:
41:
37:
36:
28:
27:
13:
10:
9:
6:
4:
3:
2:
1165:
1154:
1151:
1149:
1146:
1144:
1141:
1139:
1136:
1134:
1133:Iron minerals
1131:
1129:
1126:
1125:
1123:
1110:
1106:
1102:
1098:
1094:
1090:
1086:
1079:
1076:
1063:
1059:
1055:
1049:
1046:
1040:
1037:
1031:
1028:
1022:
1019:
1014:
1008:
1005:
1001:
997:
995:9783112361047
991:
987:
983:
979:
972:
969:
957:
950:
949:"Chondrodite"
944:
941:
936:
932:
926:
923:
918:
914:
913:"Chondrodite"
908:
905:
899:
897:
893:
888:
884:
883:"Chondrodite"
878:
875:
869:
866:
860:
858:
856:
854:
852:
850:
846:
841:
837:
832:
827:
823:
819:
815:
811:
807:
800:
797:
791:
787:
784:
782:
779:
777:
774:
772:
769:
767:
764:
763:
759:
748:
743:
741:
739:
735:
731:
727:
723:
719:
715:
713:
698:
694:
690:
686:
682:
674:
672:
658:
650:
648:
646:
642:
634:
630:
625:
618:
616:
613:
609:
607:
601:
589:
587:
585:
569:
565:
557:
555:
514:
468:
466:
464:
460:
456:
452:
448:
444:
402:with formula
401:
397:
389:
385:
381:
377:
366:
364:
360:
356:
354:
350:
347:0.027 – 0.032
346:
344:
343:Birefringence
340:
324:
322:
318:
314:
310:
306:
304:
300:
296:
294:
290:
286:
284:
280:
276:
274:
270:
266:
261:
257:
253:
251:
247:
243:
241:
237:
233:
231:
227:
223:
221:
217:
213:
211:
210:Crystal habit
207:
203:
199:
195:
193:
189:
184:
177:
174:
172:
168:
163:
156:
154:
153:Crystal class
150:
147:
144:
142:
138:
134:
132:
128:
120:
118:
114:
110:
108:
104:
63:
57:
53:
50:
49:Nesosilicates
47:
43:
38:
34:
29:
24:
19:
1138:Humite group
1092:
1088:
1078:
1066:. Retrieved
1062:the original
1057:
1048:
1039:
1030:
1021:
1007:
999:
977:
971:
959:. Retrieved
955:
943:
934:
925:
916:
907:
886:
877:
868:
813:
809:
799:
771:Alleghanyite
722:serpentinite
716:
678:
654:
645:monticellite
638:
614:
610:
604:Synthetic F
593:
561:
472:
459:serpentinite
447:hydrothermal
443:humite group
395:
394:
192:Formula mass
175:
980:: 370–406.
766:Clinohumite
693:metasomatic
681:metamorphic
675:Environment
602:parameters:
396:Chondrodite
353:Pleochroism
307:3.1 to 3.26
297:Translucent
293:Diaphaneity
196:351.6 g/mol
171:Space group
26:Chondrodite
1122:Categories
1068:27 January
935:WebMineral
792:References
738:antigorite
641:forsterite
606:end member
517:(Mg,Fe,Ti)
387:References
363:Solubility
315:Biaxial(+)
260:Mohs scale
162:H-M symbol
146:Monoclinic
107:IMA symbol
840:235729616
734:magnetite
730:magnesite
629:magnetite
600:Unit cell
590:Unit cell
572:M(O,OH,F)
566:array of
558:Structure
135:52.3.2b.2
18:Chondrite
744:See also
718:Titanian
689:fluorine
544:(F,OH,O)
451:dolomite
431:(F,OH,O)
267:6 to 6.5
263:hardness
250:Tenacity
240:Fracture
230:Cleavage
220:Twinning
45:Category
1097:Bibcode
1089:Geology
961:14 June
818:Bibcode
701:(Mg,Fe)
697:olivine
584:cations
469:Formula
404:(Mg,Fe)
254:Brittle
56:Formula
40:General
992:
917:Mindat
838:
776:Humite
712:mantle
568:anions
463:Pargas
283:Streak
273:Luster
160:(same
956:RRUFF
952:(PDF)
836:S2CID
619:Color
455:skarn
398:is a
201:Color
1070:2022
990:ISBN
963:2024
643:and
635:, US
526:(SiO
483:(SiO
457:and
413:(SiO
74:(SiO
1105:doi
982:doi
826:doi
724:in
705:SiO
598:/b
111:Chn
1124::
1103:.
1093:39
1091:.
1087:.
1056:.
998:.
988:.
954:.
933:.
915:.
895:^
885:.
848:^
834:.
824:.
814:85
812:.
808:.
740:.
732:,
714:.
699:,
554:.
474:Mg
371:SO
181:/a
176:P2
65:Mg
1111:.
1107::
1099::
1072:.
1015:.
984::
965:.
937:.
919:.
889:.
842:.
828::
820::
707:4
703:2
669:γ
665:β
661:α
596:1
577:6
549:2
540:2
535:)
531:4
522:5
506:2
501:F
497:2
492:)
488:4
479:5
436:2
427:2
422:)
418:4
409:5
373:4
369:2
335:γ
331:β
327:α
325:n
179:1
164:)
97:2
92:F
88:2
83:)
79:4
70:5
20:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
