26:
475:
Jerrygibbsite, in pure form, is a violet-pink mineral with a light pink streak. It has a calculated density of 4.045 g/cm, and a tested density of 4.00 g/cm, agreeing favorably, since measurements used to test density have few significant figures. It has a hardness of about 5.5, that of a
467:, zincite, and sonolite in an uncommon assemblage. Jerrygibbsite typically occurs as a massive mineral in interlocking anhedral crystals, up to 0.5 mm × 2.0 mm, which display a typical metamorphic texture. Subsequent finds from the Namibia mines were of two different textures.
484:. Jerrygibbsite forms orthorhombic crystals with an imperfect cleavage along the {001} plane, which can be seen by opaque lamellae alternating with the transparent jerrygibbsite. Optically, jerrygibbsite is negative biaxial with 2
379:
analysis of a sample previously assumed to be leucophoenicite. All samples found of jerrygibbsite are impure. All are incorporated within leucophoenicite, many by mixed layering, and tend to be found with many
544:
496:, jerrygibbsite appears light pink. The crystal structure described by Kato is the equivalent of a unit-cell-twinned sonolite in which the cells are related by a
463:. Most of the minerals in the humite group have been found only here, as well as leucophoenicite. Jerrygibbsite has been found to occur in contact with
328:
352:
632:
Dunn, Pete J. (1984). "Jerrygibbsite, a new polymorph of (Mn,Zn)9(SiO4)4(OH)2 from
Franklin, New Jersey, with new data on leucophoenicite".
447:
which is the same ideal formula as sonolite, a member of the humite group. Jerrygibbsite has been found to be dimorphous with sonolite.
476:
knife blade. The general luster is vitreous, or shiny. Crystals are generally transparent to translucent. Crystals are not
689:
388:. Physical properties are similar to those of leucophoenicite and sonolite, including hardness, coloring, and density.
360:
92:
679:
684:
190:
223:
327:. Jerrygibbsite was originally discovered by Pete J. Dunn in 1984, who named it after mineralogist
332:
82:
674:
356:
145:
669:
633:
602:
556:
8:
213:
203:
560:
574:
376:
180:
651:
578:
564:
456:
336:
305:
251:
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51:
375:
The mineral jerrygibbsite was discovered in 1984 by Pete Dunn while conducting an
102:
663:
489:
273:
170:
114:
44:
509:
493:
348:
107:
519:
514:
481:
477:
129:
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121:
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25:
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mine in
Franklin, New Jersey, and in the Kombat Mines in
642:
359:. It is always found with these two minerals. It is a
661:
331:(born 1929). It has only been reported from the
228:Alternating transparent and translucent lamellae
415:, although it often contains impurities of
24:
568:
455:Jerrygibbsite has been found only in the
30:Jerrygibbsite (pink) found in New Jersey
351:region. Jerrygibbsite is member of the
662:
628:
626:
624:
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610:
470:
450:
585:
545:"IMA–CNMNC approved mineral symbols"
542:
607:
13:
596:
396:The formula for jerrygibbsite is (
165:Violet-pink, with a brownish tinge
14:
701:
152:c = 28.17 ; Z = 4
536:
391:
175:Interlocking anhedral crystals
1:
654:. Referenced November 4, 2007
530:
431:. The idealized formula is Mn
370:
7:
503:
10:
706:
690:Minerals in space group 33
488: = 72˚ and a maximum
308:with the chemical formula
652:Webmineral- Jerrygibbsite
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35:
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18:
343:, United States, and in
680:Manganese(II) minerals
603:Handbook of Mineralogy
549:Mineralogical Magazine
685:Orthorhombic minerals
634:American Mineralogist
93:Strunz classification
377:X-ray spectrographic
570:10.1180/mgm.2021.43
561:2021MinM...85..291W
543:Warr, L.N. (2021).
471:Physical properties
451:Geologic occurrence
150:a = 4.85, b = 10.7
243:Optical properties
185:Imperfect on {001}
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630:
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500:/4 glide plane.
457:Franklin Furnace
414:
384:humites such as
337:Franklin Furnace
326:
306:silicate mineral
252:Refractive index
234:Specific gravity
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119:Pyramidal (mm2)
77:
57:
56:(repeating unit)
28:
16:
15:
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329:Gerald V. Gibbs
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703:
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555:(3): 291–320.
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355:family of the
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157:Identification
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103:Crystal system
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2:
702:
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675:Nesosilicates
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492:of 0.017. In
491:
490:birefringence
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353:leucophoenite
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338:
334:
333:type locality
330:
307:
303:
302:Jerrygibbsite
295:
291:
288:Measured: 72°
287:
285:
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274:Birefringence
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171:Crystal habit
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115:Crystal class
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59:
53:
49:
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45:Nesosilicates
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39:
34:
27:
22:
19:Jerrygibbsite
17:
670:Humite group
636:
598:
587:
552:
548:
538:
510:Alleghanyite
497:
494:thin section
485:
474:
454:
395:
374:
357:humite group
349:Otjozondjupa
301:
300:
134:
108:Orthorhombic
520:Clinohumite
515:Chondrodite
482:fluorescent
478:luminescent
392:Composition
246:Biaxial (−)
224:Diaphaneity
130:Space group
664:Categories
639:: 546–552.
592:Mindat.org
531:References
341:New Jersey
304:is a rare
293:References
218:Light pink
191:Mohs scale
122:H-M symbol
83:IMA symbol
579:235729616
465:willemite
421:magnesium
382:manganese
371:Discovery
278:δ = 0.017
264:= 1.783 n
260:= 1.772 n
146:Unit cell
504:See also
386:sonolite
365:sonolite
284:2V angle
208:Vitreous
194:hardness
181:Cleavage
41:Category
557:Bibcode
461:Namibia
425:calcium
398:(Mn,Zn)
361:dimorph
345:Namibia
310:(Mn,Zn)
268:= 1.789
124:: (mm2)
97:9.AF.70
61:(Mn,Zn)
52:Formula
36:General
577:
525:Humite
214:Streak
204:Luster
575:S2CID
429:water
162:Color
443:(OH)
435:(SiO
417:iron
410:(OH)
402:(SiO
322:(OH)
314:(SiO
238:4.00
73:(OH)
65:(SiO
565:doi
480:or
427:or
363:of
347:'s
335:of
198:5.5
135:Pbn
87:Jgb
666::
644:^
637:69
609:^
573:.
563:.
553:85
551:.
547:.
423:,
419:,
367:.
339:,
581:.
567::
559::
498:b
486:V
445:2
441:4
439:)
437:4
433:9
412:2
408:4
406:)
404:4
400:9
324:2
320:4
318:)
316:4
312:9
266:γ
262:β
258:α
256:n
139:1
137:2
75:2
71:4
69:)
67:4
63:9
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