336:(containing square pyramids incorporated into sheets) are arranged. Its structure contains an extra oxygen, which therefore has a very small amount of free space and consequently protrudes into neighboring layers. The oxygen then pushes aside the chlorine atoms, leaving almost no room for the lead to occupy. This is of interest to geologists for it is such a rare occurrence of structure seen only in pinalite and its
329:. The orthorhombic system is described as having three crystallographic axes of unequal lengths, normally referred to as c (the longest axis), b (the second longest axis), and a (the smallest axis). These axes all have corresponding angles of 90 degrees. Pinalite belongs to the biaxial optical class, and is negative. The main difference between biaxial and axial crystals is that biaxial crystals have two optic axes.
503:
Charkin, Dmitri and
Lightfoot, Phillip. "Synthesis of novel lead–molybdenum and lead–tungsten oxyhalides with the pinalite structure, Pb3MoO5Cl2 and Pb3WO5Br2." American Mineralogist; November 2006; v. 91; no. 11-12; p. 1918-1921. Mineralogical Society of America.
340:
analog. Therefore, it could be of use to structuralists to see how this mineral was formed. Experiments have been done, using lead oxyhalides, to see the reason and sequence of events in which this mineral is executed.
391:
540:
332:
Pinalite's structure is significant in that it is one of a kind. It is therefore important in seeing how the structures in new lead
72:
535:
202:
525:
361:, US, and was named for the location county. Pinalite has otherwise only been seen in the Grand Reef mine, near
530:
62:
520:
370:
366:
354:
182:
157:
Acicular - occurs as needle-like crystals. Bladed - aggregates of thin lath-like crystals (e.g. kyanite)
478:
Clark, A.M. (1993) Hey's
Mineral Index (Third edition). 548 p. The Natural History Museum, London, UK.
403:
192:
494:. (2007) The Manual of Mineral Science (Twenty-third edition) 187-188 p. United States of America.
421:
172:
127:
411:
230:
212:
162:
37:
362:
407:
491:
467:
350:
326:
82:
514:
425:
252:
152:
94:
323:
275:
87:
272:
116:
109:
101:
438:
333:
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262:
416:
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456:
337:
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Pinalite was first discovered in 1989 in the St. Anthony deposit,
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18:
373:, so is therefore found around orogenic activity.
8:
486:
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382:
267:Measured: 70° to 70.5°, calculated: 72°
15:
147:Bright to pale yellow, golden, orange
7:
392:"IMA–CNMNC approved mineral symbols"
132:a = 11.07 Ă…, b = 13.08 Ă…,
14:
134:c = 5.62 Ă…; Z = 4
1:
322:Pinalite crystallizes in the
557:
541:Minerals in space group 63
167:Penetration twins on {010}
345:Discovery and occurrence
307:mineral with formula: Pb
468:Handbook of Mineralogy
396:Mineralogical Magazine
371:Graham County, Arizona
367:Santa Teresa Mountains
536:Orthorhombic minerals
73:Strunz classification
490:Klein, Cornelis and
353:, Mammoth District,
417:10.1180/mgm.2021.43
408:2021MinM...85..291W
390:Warr, L.N. (2021).
526:Tungstate minerals
222:Optical properties
99:Dypyramidal (mmm)
291:
290:
217:7.78 (calculated)
32:Tungstate mineral
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231:Refractive index
213:Specific gravity
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42:(repeating unit)
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531:Halide minerals
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492:Dutrow, Barbara
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439:Webmineral data
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280:Non-fluorescent
246:
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133:
115:
104:: (2/m 2/m 2/m)
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57:
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41:
40:
12:
11:
5:
554:
552:
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402:(3): 291–320.
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327:crystal system
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139:Identification
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83:Crystal system
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521:Lead minerals
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253:Birefringence
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153:Crystal habit
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114:Orthorhombic
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95:Crystal class
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45:
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27:
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324:orthorhombic
321:
293:
292:
276:fluorescence
120:
88:Orthorhombic
273:Ultraviolet
225:Biaxial (+)
207:Transparent
203:Diaphaneity
117:Space group
110:Space group
515:Categories
457:Mindat.org
377:References
334:oxyhalides
296:is a rare
285:References
197:Adamantine
102:H-M symbol
63:IMA symbol
426:235729616
355:Pinal Co.
301:tungstate
257:δ = 0.015
243:= 2.495 n
239:= 2.490 n
128:Unit cell
363:Klondyke
305:chloride
294:Pinalite
263:2V angle
183:Tenacity
173:Cleavage
163:Twinning
29:Category
19:Pinalite
404:Bibcode
365:in the
359:Arizona
247:= 2.505
187:Brittle
77:3.DC.55
38:Formula
24:General
424:
338:barium
193:Luster
504:2006.
422:S2CID
351:Tiger
144:Color
319:.
298:lead
177:None
121:Amam
412:doi
369:in
67:Pnl
517::
483:^
445:^
420:.
410:.
400:85
398:.
394:.
357:,
315:Cl
311:WO
119::
54:Cl
50:WO
46:Pb
428:.
414::
406::
317:2
313:5
309:3
303:–
245:Îł
241:β
237:α
235:n
56:2
52:5
48:3
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