31:
531:
550:
378:
574:
891:
562:
456:; they are usually found in long slender prisms, usually about 10–20 mm but rarely up to 100 mm (4 inches) in length, with a brilliant lustre and color. Crocoite is also the official Tasmanian mineral emblem. Other localities which have yielded good crystallized specimens are Congonhas do Campo near Ouro Preto in
506:
Crocoite from
Tasmania has been mined from the Dundas Extended Mine by Mike and Eleanor Phelan since the mid-1980s, but the mine's origins date back to 1892 when it was used as a prospecting tunnel for silver lead. As at April 2019, the mine is for sale
479:
The relative rarity of crocoite is connected with the specific conditions required for its formation: an oxidation zone of lead ore bed and presence of ultramafic rocks serving as the source of chromium (in
358:
Crocoite is commonly found as large, well-developed prismatic adamantine crystals, although in many cases are poorly terminated. Crystals are of a bright hyacinth-red color, translucent, and have an
922:
Bottrill, R.S., Williams, P., Dohnt, S., Sorrell, S. and Kemp, N.R. (2006). Crocoite and associated minerals from Dundas and other locations in
Tasmania. Australian Journal of Mineralogy. 12, 59–90
452:
Abundant masses with exceptional examples of crocoite crystals have been found in the
Extended Mine at Mount Dundas as well as the Adelaide, Red Lead, West Comet, Platt and a few other Mines at
549:
401:), saffron, in allusion to its color, a name first altered to crocoisite and afterwards to crocoite. In the type locality the crystals are found in gold-bearing
56:
824:
935:
911:
906:
860:
530:
873:
573:
979:
969:
30:
449:, who in 1797 discovered (simultaneously with and independently of M. H. Klaproth) the element chromium in crocoite.
90:
492:(or other primary lead minerals) are required for crocoite formation. These conditions are relatively unusual.
211:
366:
lustre. On exposure to UV light some of the translucency and brilliancy is lost. The streak is orange-yellow;
974:
244:
984:
964:
799:
394:
959:
835:
343:
932:
446:
80:
954:
146:
201:
191:
624:
8:
919:
Bushmakin, A.F., 1996. Crocoite from the
Berezovsk gold mines. World of Stones, 10, 28–31
561:
500:
234:
224:
628:
660:
642:
555:
Crocoite from
Adelaide Mine, Dundas mineral field, Zeehan District, Tasmania, Australia
181:
854:
646:
496:
359:
632:
453:
371:
272:
254:
63:
36:
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with dark red crystals, and vauquelinite a lead and copper phosphate-chromate, Pb
418:
363:
390:
100:
948:
902:
897:
377:
367:
347:
326:
294:
171:
112:
714:
476:, near Menzies in Western Australia, plus Brazil, Germany and South Africa.
422:
386:
445:
OH, with brown or green monoclinic crystals. Vauquelinite was named after
473:
465:
304:
130:
637:
612:
915:. Vol. 7 (11th ed.). Cambridge University Press. p. 479.
385:
It was discovered at the
Berezovskoe Au Deposit (Berezovsk Mines) near
121:
105:
688:
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512:
874:
For $ 300,000, you could own a hobby mine in a
Tasmanian ghost town
537:
481:
333:
40:
896:
This article incorporates text from a publication now in the
591:
406:
511:
300,000) with the owners then continuing to operate the nearby
489:
469:
457:
414:
410:
402:
336:
461:
346:. It is identical in composition with the artificial product
330:
508:
780:
229:
Adamantine, Sub-Adamantine, Sub-Vitreous, Resinous, Waxy
739:
737:
735:
166:
Orange, red, yellow; orange-red in transmitted light.
732:
689:"Crocoite: Crocoite mineral information and data"
946:
759:De Nova Minerae Plumbi Specie Crystallina Rubra
186:Distinct on {110} indistinct on {001} and {100}
867:
579:On pyromorphite – Berezovsk – Deposit Topotype
425:. Phoenicochroite is a basic lead chromate, Pb
153:c = 6.8 Å; β = 102.41°; Z = 4
774:
636:
901:
784:Traite elementaire de Mineralogie. 2. ed
743:
499:, it is toxic, containing both lead and
376:
797:
755:
653:
947:
859:: CS1 maint: archived copy as title (
798:Moore, Thomas P.; Wilson, Wendell E.
749:
707:
681:
488:(from chromite) and decomposition of
613:"IMA–CNMNC approved mineral symbols"
610:
13:
151:a = 7.12 Å, b = 7.421 Å,
14:
996:
926:
781:Francois-Sulpice Beudant (1832).
536:Specimen from the Red Lead Mine,
413:and associated with crocoite are
889:
572:
560:
548:
529:
397:in 1832, from the Greek κρόκος (
176:Coarsely crystalline to acicular
29:
933:List of Tasmanian state emblems
393:in 1766; and named crocoise by
817:
791:
604:
353:
1:
597:
800:"Major Crocoite Discoveries"
7:
585:
495:As crocoite is composed of
484:). Oxidation of Cr into CrO
342:, and crystallizing in the
325:is a mineral consisting of
10:
1001:
980:Minerals described in 1832
970:Minerals in space group 14
518:
381:Crocoite crystal structure
249:Transparent to translucent
350:used as a paint pigment.
344:monoclinic crystal system
313:
303:
293:
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263:
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62:
52:
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28:
23:
938:25 December 2018 at the
807:The Mineralogical Record
787:. Verdiere. p. 669.
912:Encyclopædia Britannica
832:www.kremer-pigmente.com
715:"Crocoite Mineral Data"
447:Louis Nicolas Vauquelin
756:Lehmann, J.G. (1766).
617:Mineralogical Magazine
382:
668:Rruff.geo.arizona.edu
524:Examples of crocoite
380:
91:Strunz classification
16:Lead chromate mineral
975:Luminescent minerals
196:Conchoidal to uneven
985:Symbols of Tasmania
965:Monoclinic minerals
876:, Damian McIntyre,
661:"Crocoite (PbCrO4)"
638:10.1180/mgm.2021.43
629:2021MinM...85..291W
611:Warr, L.N. (2021).
567:Crystal intergrowth
501:hexavalent chromium
72:Lead Chromate PbCrO
695:. 15 December 2016
405:-veins traversing
383:
370:is 2.5–3; and the
264:Optical properties
960:Chromate minerals
497:lead(II) chromate
320:
319:
125:
57:Chromate minerals
992:
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895:
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841:on 23 March 2014
840:
834:. Archived from
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454:Dundas, Tasmania
372:specific gravity
273:Refractive index
255:Specific gravity
239:Yellowish orange
216:
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69:
68:(repeating unit)
33:
21:
20:
1000:
999:
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994:
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940:Wayback Machine
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905:, ed. (1911). "
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880:, 26 April 2019
878:ABC News Online
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827:
825:"Archived copy"
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419:phoenicochroite
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140:
118:
117:Prismatic (2/m)
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67:
66:
43:
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12:
11:
5:
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927:External links
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903:Chisholm, Hugh
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719:Webmineral.com
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623:(3): 291–320.
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158:Identification
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101:Crystal system
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35:Crocoite from
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15:
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6:
4:
3:
2:
997:
986:
983:
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955:Lead minerals
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904:
899:
898:public domain
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744:Chisholm 1911
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448:
424:
420:
417:, embreyite,
416:
412:
408:
404:
400:
396:
395:F. S. Beudant
392:
388:
379:
375:
373:
369:
368:Mohs hardness
365:
361:
351:
349:
348:chrome yellow
345:
338:
335:
332:
328:
327:lead chromate
324:
316:
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295:Birefringence
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172:Crystal habit
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113:Crystal class
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843:. Retrieved
836:the original
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764:. Retrieved
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722:. Retrieved
718:
709:
697:. Retrieved
692:
683:
671:. Retrieved
667:
655:
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523:
505:
494:
478:
451:
423:vauquelinite
398:
387:Ekaterinburg
384:
357:
322:
321:
285:= 2.360(2) n
281:= 2.290(2) n
135:
18:
724:19 December
699:19 December
673:19 December
474:Mashonaland
466:Philippines
354:Description
305:Pleochroism
267:Biaxial (+)
245:Diaphaneity
131:Space group
949:Categories
845:13 January
813:: 651–673.
766:9 November
762:(in Latin)
693:Mindat.org
598:References
360:adamantine
314:References
289:= 2.660(2)
212:Mohs scale
122:H-M symbol
106:Monoclinic
81:IMA symbol
647:235729616
542:Australia
513:Stichtite
299:δ = 0.370
147:Unit cell
936:Archived
907:Crocoite
855:cite web
586:See also
538:Tasmania
482:chromite
374:is 6.0.
364:vitreous
323:Crocoite
215:hardness
202:Tenacity
192:Fracture
182:Cleavage
53:Category
41:Tasmania
24:Crocoite
900::
625:Bibcode
592:Bellite
519:Gallery
464:in the
407:granite
389:in the
259:5.9–6.1
206:Sectile
95:7.FA.20
64:Formula
48:General
894:
645:
515:mine.
490:galena
470:Mutare
458:Brazil
415:quartz
411:gneiss
403:quartz
399:krokos
235:Streak
225:Luster
120:(same
37:Dundas
839:(PDF)
828:(PDF)
803:(PDF)
664:(PDF)
643:S2CID
462:Luzon
437:CuCrO
391:Urals
219:2.5–3
163:Color
861:link
847:2022
768:2018
726:2016
701:2016
675:2016
421:and
309:Weak
909:".
633:doi
509:A$
472:in
429:CrO
409:or
362:to
85:Crc
951::
857:}}
853:{{
830:.
811:43
809:.
805:.
734:^
717:.
691:.
666:.
641:.
631:.
621:85
619:.
615:.
540:,
503:.
468:,
460:,
441:PO
334:Cr
331:Pb
329:,
141:/n
136:P2
39:,
863:)
849:.
770:.
746:.
728:.
703:.
677:.
649:.
635::
627::
507:(
486:4
443:4
439:4
435:2
431:5
427:2
340:4
337:O
287:γ
283:β
279:α
277:n
139:1
124:)
74:4
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
