379:. However, because of malhmoodite's small size and rarity, it could not be determined chemically by macroscopic tools. X-ray powder data brought the most information about the formulation and then was combined with the elemental information from the scanning electron microscope. The mineral has been attempted to be synthesized in a lab multiple times, but there has been no success. The average composition from the examined malhmoodite grains are listed in the table below. It was collected from 25 analyses. The H
289:. This mine is 10 km west of Magnet Cove, an alkaline igneous complex, and Union Carbide is in a contact region of alkalic igneous rocks and surrounding sedimentary rocks. The mineral has been approved by the Commission on New Minerals and Mineral Names, IMA, to be named for the late Bertha K. Malhmood, the Administrative Assistant of the Branch of Analytical Laboratories, U.S. Geological Survey.
26:
322:. The spherules of Malhmoodite are made up of thin, flat, radiating, optically homogeneous crystals and seem to form in a parallel extinction and positive elongation. The cores of the spherules appear to be loose material, making up about one-third to one-half of the radius of the spherule. However, the core seems to show higher amounts of
326:
than the rest of the spherule by using X-ray spectra. The fibers of the mineral are soft and the density could not be directly measured. It was instead calculated using the unit-cell content of four formula units and determined to be 2.877 g/cm. In the crystal structure work of
Malhmoodite, it was
301:
plates and seems to be the last deposited in the cavities it occurs. The mineral is very rare, with the only common place to find it in Wilson
Springs. However, a few other specimens have been found in
671:
593:. When compared with everything in the known database, there was no match. However, there was a resemblance to a number of other compounds with the type of formula of M
383:
O was by difference and likely reduced by the vacuum when examining the samples. The numbers in the parentheses after the weight percent is the standard deviation.
30:
Malhmoodite.Locality: Kerriack Cove, Porthtowan Area, St Agnes
District, Cornwall, England, UK. Yellowish-white sphere on matrix. Field of view 2 mm.
799:
100:
348:
319:
183:
794:
352:
789:
784:
745:
O, a new iron zirconium phosphate mineral from Wilson
Springs, Arkansas. American Mineralogist. Mag., 78, 437–440.
336:
90:
779:
173:
339:. The refractive indices are: α = 1.640, β = 1.652, and γ = 1.652 (Na). Dispersion is relatively weak.
327:
found that there was a common layer. It is considered a pseudohexagonal with orthorhombic dimensions.
683:
256:
196:
701:
122:
691:
650:
224:
51:
582:
687:
590:
128:
110:
773:
705:
286:
246:
163:
145:
318:
Malhmoodite is a creamy-white mineral with a silky luster. It exhibits a 3 on the
25:
598:
586:
360:
298:
115:
67:
618:
594:
356:
278:
63:
44:
281:
mineral first discovered at a mine called Union
Carbide in Wilson Springs,
637:. However, in that grouping before examining Malhmoodite, there was never
608:
376:
282:
77:
696:
760:
368:
307:
303:
206:
630:
626:
622:
614:
601:
372:
323:
83:
70:
585:
with CrKα radiation to detect reflections. Malhmoodite is in the
638:
634:
364:
60:
733:
Milton, C., McGee, J., and H. Evans (1993) Mahlmoodite, FeZr(PO
589:
crystal system. The result was recorded as d = 1.52
355:
to show that the mineral contained major amounts of
759:Hudson Institute of Mineralogy, 2019, Malhmoodite:
265:
255:
245:
223:
215:
205:
195:
182:
172:
162:
154:
144:
139:
121:
109:
99:
89:
50:
40:
35:
18:
581:A single bundle of fibers was examined with a
8:
24:
695:
755:
753:
751:
729:
727:
725:
723:
721:
719:
717:
715:
385:
662:
15:
7:
761:https://www.mindat.org/min-2544.html
672:"IMA–CNMNC approved mineral symbols"
367:, but also some minute amounts of
14:
349:energy-dispersive X-ray spectra
347:Malhmoodite was examined using
297:Malhmoodite occurs perched on
1:
353:scanning electron microscope
816:
800:Minerals described in 1993
23:
763:(accessed November 2019)
363:, a moderate amount of
676:Mineralogical Magazine
617:where M was equal to
577:X-ray crystallography
101:Strunz classification
795:Monoclinic minerals
697:10.1180/mgm.2021.43
688:2021MinM...85..291W
670:Warr, L.N. (2021).
343:Chemical properties
320:Mohs hardness scale
314:Physical properties
790:Phosphate minerals
785:Zirconium minerals
331:Optical properties
216:Optical properties
572:
571:
272:
271:
133:c = 19.17 Å
807:
764:
757:
746:
731:
710:
709:
699:
667:
651:List of Minerals
386:
337:biaxial negative
225:Refractive index
219:Biaxial negative
188:
178:Radiating fibers
131:b = 5.42 Å
57:
56:(repeating unit)
28:
16:
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770:
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713:
669:
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664:
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647:
641:in the M spot.
613:
606:
583:Gandolfi camera
579:
550:
526:
511:
453:
449:
435:
421:
407:
403:
382:
345:
335:Malhmoodite is
333:
316:
295:
261:Relatively weak
240:
236:
232:
186:
134:
132:
82:
75:
55:
54:
31:
12:
11:
5:
813:
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711:
682:(3): 291–320.
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140:Identification
137:
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127:a = 9.12
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111:Crystal system
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780:Iron minerals
778:
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287:United States
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247:Birefringence
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164:Crystal habit
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39:
34:
27:
22:
17:
679:
675:
665:
580:
573:
395:Mole Ratios
346:
334:
317:
296:
274:
273:
158:Creamy-white
146:Formula mass
275:Malhmoodite
19:Malhmoodite
774:Categories
657:References
587:monoclinic
299:kolbeckite
293:Occurrence
266:References
257:Dispersion
211:2.877 g/cm
184:Mohs scale
116:Monoclinic
91:IMA symbol
706:235729616
279:phosphate
251:δ = 0.012
237:= 1.652 n
233:= 1.640 n
168:Spherules
135:β= 94.81°
123:Unit cell
105:7/C.09-35
45:Phosphate
645:See also
283:Arkansas
187:hardness
174:Tenacity
41:Category
684:Bibcode
565:(100.0)
515:0.11(5)
500:0.26(6)
467:16.1(8)
424:28.7(6)
410:36.2(9)
351:from a
308:England
304:Belgium
241:= 1.652
207:Density
52:Formula
36:General
704:
633:, and
554:(14.7)
540:0.5(2)
529:0.3(2)
489:1.3(5)
478:0.8(2)
456:0.3(1)
438:0.7(1)
375:, and
197:Luster
150:409.07
702:S2CID
562:Total
532:0.02
518:0.03
492:0.09
481:0.04
470:0.88
459:0.02
441:0.03
427:0.91
413:2.01
389:Oxide
277:is a
201:Silky
155:Color
568:---
557:3.2
503:0.3
359:and
306:and
692:doi
607:)•4
523:SiO
497:MgO
486:CaO
475:MnO
464:FeO
432:TiO
418:ZrO
392:Wt%
95:Mmo
76:)·4
776::
750:^
741:4H
714:^
700:.
690:.
680:85
678:.
674:.
639:Fe
635:Zn
631:Cu
629:,
627:Co
625:,
623:Ni
621:,
619:Mn
595:Zr
508:Na
446:Al
377:Ti
373:Si
371:,
369:Ca
365:Fe
357:Zr
324:Si
310:.
285:,
64:Zr
61:Fe
743:2
739:2
737:)
735:4
708:.
694::
686::
615:O
612:2
609:H
605:4
602:O
599:P
597:(
591:Å
551:O
549:2
547:H
537:F
525:2
512:O
510:2
452:3
450:O
448:2
434:2
420:2
406:5
404:O
402:2
400:P
381:2
361:P
239:γ
235:β
231:α
229:n
191:3
129:Å
84:O
81:2
78:H
74:4
71:O
68:P
66:(
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