29:
373:
1034:
462:
in 1925, Williams recognized that his samples of bultfonteinite were not natrolite, but were likely a new mineral species. Chemical analysis by John Parry and crystallographic and optical determination by Wright proved it to be a new mineral. The mineral was described by Parry, Williams, and Wright
447:, was given to Alpheus F. Williams. Several years later, additional samples were found by C. E. Adams in the nearby Dutoitspan mine and given to the MacGregor Museum in Kimberley. Shortly before 1932, the mineral was found about 100 miles (160 km) to the southeast of Kimberley at the
502:
Bultfonteinite has been found in
Australia, Botswana, Canada, Israel, Japan, Jordan, Russia, South Africa, and the United States. The mineral was first located outside South Africa in the US state of California in 1955. Bultfonteinite has been found in association with
467:. Their original description does not explicitly state the origin of the name, but it is presumably named after the mine in which it was discovered. Earlier that year in his book
472:
982:
1059:
911:
756:
720:
28:
1069:
364:. It was discovered in 1903 or 1904 in the Bultfontein mine in South Africa, for which the mineral is named, and described in 1932.
89:
973:
427:
In either 1903 or 1904, a miner discovered the first specimen of bultfonteinite on the 480-foot level of the
Bultfontein mine in
380:
Bultfonteinite is transparent and ranges from pale pink or light brown to colorless. The mineral occurs as radiating prismatic
491:
217:
676:
547:
250:
1079:
1064:
483:
99:
1054:
1038:
635:
428:
381:
535:
79:
1074:
990:
919:
879:
964:
205:
1015:
999:
928:
888:
580:
487:
944:
471:, Williams had called the mineral dutoitspanite, a name which was "apparently discarded". When the
452:
412:
314:
240:
230:
210:
850:
598:
476:
448:
195:
752:
746:
709:
393:
330:
158:
520:
1007:
936:
896:
588:
416:
268:
185:
54:
432:
1003:
932:
892:
584:
109:
372:
1048:
983:"On bultfonteinite, a new fluorine-bearing hydrouscalcium silicate from South Africa"
602:
294:
121:
47:
1011:
956:
940:
550:, bultfonteinite formed in the contact zone of thermally metamorphosed limestone.
661:
508:
143:
901:
543:
436:
408:
324:
134:
528:
516:
504:
459:
444:
114:
1033:
539:
524:
440:
397:
304:
593:
568:
512:
352:, is a pink, light-brown or colorless mineral with chemical formula Ca
631:
981:
Parry, John; Williams, Alpiieus F.; Wright, F. E. (September 1932).
786:
784:
782:
780:
431:, South Africa. The mineral occurred in a several-hundred-foot-tall
396:
of bultfonteinite consists of strips of , that run along the 5.67
371:
912:"Rhodesite, a new mineral from the Bultfontein mine, Kimberley"
384:
crystals and radial spherules up to 2 cm (0.8 in).
443:
and shale fragments. The specimen, mistakenly thought to be
407:
O–Ca, and Ca–O–Si bonds. Silicon atoms occur in isolated
803:
801:
799:
458:
After John Parry and F. E. Wright described the mineral
419:
with a seventh atom present on one of the square faces.
376:
Acicular crystals from the
Wessels Mine in South Africa
819:
790:
336:
323:
313:
303:
293:
267:
259:
249:
239:
229:
216:
204:
194:
184:
176:
171:
157:
142:
120:
108:
98:
88:
78:
53:
43:
38:
21:
849:
751:. Penguin Random House South Africa. p. 175.
190:Interpenetrating on {100} and {010}; polysynthetic
538:, the mineral occurred in a large structure of
403:-axis, held together by Ca–O–Ca, Ca–F–Ca, Ca–H
8:
33:Bultfonteinite from Shijiangshan mine, China
957:"Bultfonteinite from Crestmore, California"
748:Minerals & Gemstones of Southern Africa
675:(1). Mineralogical Society of America: 32.
955:Murdoch, Joseph (September–October 1955).
704:
702:
700:
698:
696:
655:
653:
900:
592:
831:
626:
624:
622:
620:
618:
616:
614:
612:
807:
559:
473:International Mineralogical Association
167:β = 91.32°, γ = 89.85°; Z = 4
771:
638:from the original on November 14, 2009
411:and the calcium atoms have seven-fold
18:
7:
851:"The structure of bultfonteinite, Ca
569:"IMA–CNMNC approved mineral symbols"
726:from the original on August 1, 2012
662:"New Mineral Names: Bulfonteinite"
14:
910:Mountain, E. D. (December 1957).
820:Parry, Williams & Wright 1932
791:Parry, Williams & Wright 1932
163:a = 10.99 Å, b = 8.18 Å
1032:
974:Mineralogical Society of America
475:was founded, bultfonteinite was
27:
682:from the original on 2012-07-23
1012:10.1180/minmag.1932.023.138.01
660:Foshag, W. F. (January 1933).
1:
1060:Crestmore Heights, California
941:10.1180/minmag.1957.31.239.01
479:as a valid mineral species.
319:r > v; barely perceptible
180:Colorless, pink, light brown
719:. Mineral Data Publishing.
165:c = 5.67 Å, α = 93.95°
1096:
745:Cairncross, Bruce (2022).
469:The Genesis of the Diamond
1070:Minerals in space group 2
902:10.1107/S0365110X63001456
542:and shale fragments in a
26:
200:Good on {100} and {010}
991:Mineralogical Magazine
920:Mineralogical Magazine
880:Acta Crystallographica
848:McIver, E. J. (1963).
717:Handbook of Mineralogy
573:Mineralogical Magazine
492:Natural History Museum
486:is held in England at
377:
965:American Mineralogist
669:American Mineralogist
548:Crestmore, California
375:
90:Strunz classification
1041:at Wikimedia Commons
488:Cambridge University
16:Nesosilicate mineral
1004:1932MinM...23..145P
933:1957MinM...31..607M
893:1963AcCry..16..551M
594:10.1180/mgm.2021.43
585:2021MinM...85..291W
567:Warr, L.N. (2021).
453:Orange River Colony
100:Dana classification
1080:Triclinic minerals
463:in 1932 and named
449:Jagersfontein Mine
378:
260:Optical properties
1065:Fluorine minerals
1037:Media related to
758:978-1-77584-754-0
415:, derived from a
394:crystal structure
343:
342:
331:hydrochloric acid
138:
1087:
1055:Calcium minerals
1036:
1022:
1020:
1014:. Archived from
998:(138): 145–162.
987:
977:
961:
951:
949:
943:. Archived from
927:(239): 607–610.
916:
906:
904:
876:
873:
835:
829:
823:
817:
811:
805:
794:
788:
775:
769:
763:
762:
742:
736:
735:
733:
731:
725:
714:
710:"Bultfonteinite"
706:
691:
690:
688:
687:
681:
666:
657:
648:
647:
645:
643:
632:"Bultfonteinite"
628:
607:
606:
596:
564:
417:triangular prism
269:Refractive index
222:
153:
132:
129:
60:
59:(repeating unit)
31:
19:
1095:
1094:
1090:
1089:
1088:
1086:
1085:
1084:
1045:
1044:
1029:
1018:
985:
980:
959:
954:
947:
914:
909:
874:
870:
866:
862:
858:
854:
847:
839:
838:
830:
826:
818:
814:
806:
797:
789:
778:
770:
766:
759:
744:
743:
739:
729:
727:
723:
712:
708:
707:
694:
685:
683:
679:
664:
659:
658:
651:
641:
639:
630:
629:
610:
566:
565:
561:
556:
500:
425:
406:
390:
370:
363:
359:
355:
288:
284:
282:
278:
276:
220:
166:
164:
151:
131:
127:
74:
70:
66:
58:
57:
34:
17:
12:
11:
5:
1093:
1091:
1083:
1082:
1077:
1072:
1067:
1062:
1057:
1047:
1046:
1043:
1042:
1039:Bultfonteinite
1028:
1027:External links
1025:
1024:
1023:
1021:on 2017-08-15.
978:
972:(9 & 10).
952:
950:on 2017-08-09.
907:
887:(6): 551–558.
868:
864:
860:
856:
852:
837:
836:
834:, p. 610.
824:
822:, p. 146.
812:
810:, p. 900.
795:
793:, p. 145.
776:
774:, p. 551.
764:
757:
737:
692:
649:
608:
579:(3): 291–320.
558:
557:
555:
552:
499:
496:
465:bultfonteinite
424:
421:
404:
389:
386:
369:
366:
361:
357:
353:
346:Bultfonteinite
341:
340:
338:
334:
333:
327:
321:
320:
317:
311:
310:
309:70° (measured)
307:
301:
300:
297:
291:
290:
286:
280:
274:
271:
265:
264:
261:
257:
256:
253:
247:
246:
243:
237:
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227:
226:
223:
214:
213:
208:
202:
201:
198:
192:
191:
188:
182:
181:
178:
174:
173:
172:Identification
169:
168:
161:
155:
154:
146:
140:
139:
124:
118:
117:
112:
110:Crystal system
106:
105:
102:
96:
95:
92:
86:
85:
82:
76:
75:
72:
68:
64:
61:
51:
50:
45:
41:
40:
36:
35:
32:
24:
23:
22:Bultfonteinite
15:
13:
10:
9:
6:
4:
3:
2:
1092:
1081:
1078:
1076:
1075:Nesosilicates
1073:
1071:
1068:
1066:
1063:
1061:
1058:
1056:
1053:
1052:
1050:
1040:
1035:
1031:
1030:
1026:
1017:
1013:
1009:
1005:
1001:
997:
993:
992:
984:
979:
975:
971:
967:
966:
958:
953:
946:
942:
938:
934:
930:
926:
922:
921:
913:
908:
903:
898:
894:
890:
886:
882:
881:
872:
846:
845:
844:
843:
833:
832:Mountain 1957
828:
825:
821:
816:
813:
809:
804:
802:
800:
796:
792:
787:
785:
783:
781:
777:
773:
768:
765:
760:
754:
750:
749:
741:
738:
722:
718:
711:
705:
703:
701:
699:
697:
693:
678:
674:
670:
663:
656:
654:
650:
637:
633:
627:
625:
623:
621:
619:
617:
615:
613:
609:
604:
600:
595:
590:
586:
582:
578:
574:
570:
563:
560:
553:
551:
549:
545:
541:
537:
536:type locality
532:
530:
526:
522:
518:
514:
510:
506:
497:
495:
493:
489:
485:
484:type material
480:
478:
477:grandfathered
474:
470:
466:
461:
456:
454:
450:
446:
442:
438:
434:
430:
422:
420:
418:
414:
410:
402:
399:
395:
387:
385:
383:
374:
367:
365:
351:
350:dutoitspanite
348:, originally
347:
339:
335:
332:
328:
326:
322:
318:
316:
312:
308:
306:
302:
298:
296:
295:Birefringence
292:
272:
270:
266:
262:
258:
254:
252:
248:
244:
242:
238:
234:
232:
228:
224:
219:
215:
212:
209:
207:
203:
199:
197:
193:
189:
187:
183:
179:
175:
170:
162:
160:
156:
150:
147:
145:
141:
136:
125:
123:
122:Crystal class
119:
116:
113:
111:
107:
103:
101:
97:
93:
91:
87:
83:
81:
77:
62:
56:
52:
49:
48:Nesosilicates
46:
42:
37:
30:
25:
20:
1016:the original
995:
989:
969:
963:
945:the original
924:
918:
884:
878:
842:Bibliography
841:
840:
827:
815:
808:Murdoch 1955
767:
747:
740:
728:. Retrieved
716:
684:. Retrieved
672:
668:
640:. Retrieved
576:
572:
562:
533:
501:
481:
468:
464:
457:
426:
413:coordination
400:
391:
379:
349:
345:
344:
148:
126:Pinacoidal (
772:McIver 1963
509:apophyllite
494:in London.
368:Description
329:Soluble in
263:Biaxial (+)
255:Transparent
251:Diaphaneity
144:Space group
1049:Categories
976:: 900–904.
686:2012-07-19
634:. Mindat.
554:References
544:kimberlite
498:Occurrence
439:-enclosed
437:kimberlite
409:tetrahedra
337:References
325:Solubility
315:Dispersion
218:Mohs scale
211:Conchoidal
135:H-M symbol
80:IMA symbol
603:235729616
546:pipe. In
529:xonotlite
517:natrolite
505:afwillite
460:afwillite
445:natrolite
429:Kimberley
388:Structure
299:δ = 0.010
159:Unit cell
115:Triclinic
730:July 19,
721:Archived
677:Archived
642:July 19,
636:Archived
540:dolerite
525:scawtite
490:and the
441:dolerite
382:acicular
305:2V angle
235:Vitreous
221:hardness
206:Fracture
196:Cleavage
186:Twinning
104:52.4.7.2
44:Category
1000:Bibcode
929:Bibcode
889:Bibcode
581:Bibcode
534:At the
521:oyelite
513:calcite
423:History
289:= 1.597
283:= 1.590
277:= 1.587
94:9.AG.80
55:Formula
39:General
755:
601:
527:, and
360:(OH,F)
241:Streak
231:Luster
133:(same
71:(OH,F)
1019:(PDF)
986:(PDF)
960:(PDF)
948:(PDF)
915:(PDF)
875:(PDF)
724:(PDF)
713:(PDF)
680:(PDF)
665:(PDF)
599:S2CID
433:horse
245:White
177:Color
753:ISBN
732:2012
644:2012
482:The
392:The
1008:doi
937:doi
897:doi
589:doi
451:in
435:of
356:SiO
225:4.5
84:Bul
67:SiO
1051::
1006:.
996:23
994:.
988:.
970:40
968:.
962:.
935:.
925:31
923:.
917:.
895:.
885:16
883:.
877:.
861:10
855:Si
798:^
779:^
715:.
695:^
673:18
671:.
667:.
652:^
611:^
597:.
587:.
577:85
575:.
571:.
531:.
523:,
519:,
515:,
511:,
507:,
455:.
63:Ca
1010::
1002::
939::
931::
905:.
899::
891::
871:"
869:6
867:H
865:2
863:F
859:O
857:2
853:4
761:.
734:.
689:.
646:.
605:.
591::
583::
405:2
401:c
398:Å
362:4
358:2
354:2
287:γ
285:n
281:β
279:n
275:α
273:n
152:1
149:P
137:)
130:)
128:1
73:4
69:2
65:2
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