384:
26:
370:
mineral which means the velocity of light differs when traveling through it depending on the cut of its cross-section which gives it more than one refractive index. The mineral is optically biaxial. Its birefringence value is 0.007. It has three
363:. Minyulite belongs to the orthorhombic crystal system. This indicates that it has three axes of unequal length yet all are perpendicular to each other. Its cell constants are a=9.35, b=9.74 c=5.52.
445:
The mineral can be found in the underlying phosphatized rock zone of ornithogenic soil. Minyulite is not found in abundance, it can be found in the seashore of the maritime Arctic.
375:
which are nα=1.531 nβ=1.534 nγ=1.538. Refractive indices are a ratio of the speed of light in a median with respect to the speed of light passing through the mineral.
596:
Spencer, L.J., F.A. Bannister, M.H. Hey, and H. Bennett (1943) Minyulite (hydrous K-Al fluophosphate) from South
Australia. Mineralogical Magazine, 26, 309–314.
605:
Simpson, E.S., and Le
Mesurier, C.R.(1933)Minyulite: a new phosphate mineral from Dandaragn. Journal of the Royal Society of Western Australia: 19-13.
587:
Klein, C., and Dutrow, B.(2007) The 23rd
Edition of the Manual of Mineral Science, 290 p. John Wiley and Sons, Inc. Hoboken, New Jersey, U.S.A.
418:
Minyulite is considered as a secondary phosphate since it is formed by the alteration of a primary phosphate. It occurs in association with
640:
91:
614:
Tatur, A., and Keck, A. (1990) Phosphates in ornithogenic soils of the
Maritime Antarctic.Proc. NIPR Symp. Polar Biol: 3, 133-150.
635:
218:
30:
Colorless minyulite crystals from Tom's
Phosphate quarry, Kapunda, Mount Lofty Ranges, South Australia (Field of view 4 mm)
251:
650:
645:
630:
510:
404:
81:
208:
198:
475:
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231:
408:
493:
392:
372:
188:
419:
412:
383:
333:
143:
44:
483:
279:
261:
51:
575:
Kampf, A.R. (1977) Minyulite: its atomic arrangement. American
Mineralogist, 62, 256–262.
403:
It was first described in 1933 for an occurrence in
Western Australia and named after the
538:
479:
359:
It occurs as groups of radiating fine fibrous crystals within rock cracks of phosphatic
439:
101:
624:
497:
301:
178:
113:
396:
160:
106:
549:
367:
131:
25:
122:
435:
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Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
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50:
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18:
563:CNMNC Newsletter 63; Mineralogical Magazine, 85,
366:As for its optical properties, Minyulite is an
8:
487:
520:
518:
351:
347:
343:
339:
583:
581:
559:
557:
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183:Radiating fibrous to prismatic crystals
15:
534:
532:
7:
464:"IMA–CNMNC approved mineral symbols"
565:https://doi.org/10.1180/mgm.2021.74
173:Colorless to white, greenish yellow
391:(green), from Ross Hannibal Mine,
148:a = 9.34 Å, b = 9.74 Å,
14:
150:c = 5.52 Å; Z = 2
24:
399:, US (size: 7.1 x 5.4 x 2.7 cm)
316:Measured: 70° , calculated: 82°
1:
236:Vitreous, silky in aggregates
336:with a chemical formula of
667:
641:Minerals in space group 32
356:(redefinition, IMA21-E).
23:
539:Handbook of Mineralogy
468:Mineralogical Magazine
400:
387:Minyulite (white) and
636:Orthorhombic minerals
386:
92:Strunz classification
525:Minyulite at Mindat
489:10.1180/mgm.2021.43
480:2021MinM...85..291W
462:Warr, L.N. (2021).
651:Aluminium minerals
646:Potassium minerals
631:Phosphate minerals
401:
373:refractive indices
271:Optical properties
413:Western Australia
334:phosphate mineral
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126:
45:Phosphate mineral
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280:Refractive index
262:Specific gravity
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120:
118:Pyramidal (mm2)
57:
56:(repeating unit)
28:
16:
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550:Webmineral data
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5:
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474:(3): 291–320.
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440:leucophosphite
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155:Identification
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102:Crystal system
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405:type locality
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393:Lead District
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302:Birefringence
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193:{001} Perfect
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179:Crystal habit
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114:Crystal class
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27:
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592:
571:
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471:
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457:
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417:
409:Minyulo Well
402:
397:South Dakota
365:
358:
329:
328:
165:372.57 g/mol
161:Formula mass
136:
107:Orthorhombic
368:anisotropic
274:Biaxial (+)
256:Transparent
252:Diaphaneity
132:Space group
625:Categories
449:References
379:Occurrence
350:F·4(H
332:is a rare
321:References
219:Mohs scale
123:H-M symbol
82:IMA symbol
498:235729616
436:variscite
432:wavellite
428:fluellite
420:dufrenite
389:sincosite
361:ironstone
330:Minyulite
306:δ = 0.007
292:= 1.534 n
288:= 1.531 n
144:Unit cell
19:Minyulite
312:2V angle
222:hardness
209:Tenacity
199:Fracture
189:Cleavage
41:Category
476:Bibcode
424:apatite
296:= 1.538
213:Brittle
96:8.DH.05
52:Formula
36:General
496:
242:Streak
232:Luster
121:(same
494:S2CID
246:White
170:Color
72:F·4(H
438:and
266:2.45
137:Pba2
484:doi
411:in
342:(PO
338:KAl
226:3.5
86:Myu
64:(PO
60:KAl
627::
580:^
556:^
531:^
517:^
492:.
482:.
472:85
470:.
466:.
442:.
434:,
430:,
426:,
422:,
415:.
407:,
395:,
354:O)
76:O)
500:.
486::
478::
352:2
348:2
346:)
344:4
340:2
294:γ
290:β
286:α
284:n
125:)
74:2
70:2
68:)
66:4
62:2
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