29:
369:. Due to its size, mansfieldite is hard to see even under a microscope. The pink variation of the mineral is due to cobalt impurities, otherwise it is white to light gray. It can be found in the US, Mexico, France, Algeria, England, Australia, Germany, Algeria and Kazakhstan.
361:, and it is the aluminium analogue of said gem. Mansfieldite is colorless in transmitted light. It is mostly made out of oxygen (47.54%). Other components include arsenic (37.1%), aluminium (13.36%) and hydrogen (2%). Mansfieldite crystals form due to
356:
is an uncommon mineral that was named after an
American geologist, George Rogers Mansfield. It has been considered a valid species since 1948. It is a member of the variscite group. Mansfieldite creates a series with
83:
517:
221:
254:
522:
512:
93:
73:
211:
398:
334:
244:
234:
416:
201:
483:
158:
406:
366:
292:
264:
51:
402:
103:
506:
420:
314:
191:
115:
362:
173:
108:
458:
146:
126:
358:
28:
324:
411:
386:
434:
274:
44:
206:
Indistinct on {201} and on {001} and {100} in traces
343:
333:
323:
313:
291:
283:
273:
263:
253:
243:
233:
220:
210:
200:
190:
182:
172:
167:
157:
145:
114:
102:
92:
82:
72:
50:
40:
35:
21:
8:
365:origin in altered and mineralized andesitic
484:"Mansfieldite mineral information and data"
27:
410:
377:
18:
7:
387:"IMA–CNMNC approved mineral symbols"
329:Measured 30°–68°, calculated 38°–82°
14:
1:
459:"Mansfieldite Mineral Data"
539:
120:Orthorhombic-Dipyramidal (
482:Minerals, Dakota Matrix.
26:
259:Transparent, transculent
196:Spherical, encrustations
391:Mineralogical Magazine
518:Orthorhombic minerals
84:Strunz classification
488:www.dakotamatrix.com
412:10.1180/mgm.2021.43
403:2021MinM...85..291W
385:Warr, L.N. (2021).
94:Dana classification
523:Aluminium minerals
284:Optical properties
513:Arsenate minerals
367:pyroclastic rocks
351:
350:
344:Common impurities
305:= 1.624 – 1.649 n
301:= 1.622 – 1.631 n
186:White, light gray
530:
498:
497:
495:
494:
479:
473:
472:
470:
469:
455:
449:
448:
446:
445:
431:
425:
424:
414:
382:
293:Refractive index
265:Specific gravity
226:
57:
56:(repeating unit)
31:
19:
16:Arsenate mineral
538:
537:
533:
532:
531:
529:
528:
527:
503:
502:
501:
492:
490:
481:
480:
476:
467:
465:
457:
456:
452:
443:
441:
433:
432:
428:
384:
383:
379:
375:
309:= 1.642 – 1.663
308:
304:
300:
224:
125:
67:
63:
55:
54:
17:
12:
11:
5:
536:
534:
526:
525:
520:
515:
505:
504:
500:
499:
474:
463:webmineral.com
450:
439:www.mindat.org
435:"Mansfieldite"
426:
397:(3): 291–320.
376:
374:
371:
349:
348:
345:
341:
340:
337:
331:
330:
327:
321:
320:
317:
311:
310:
306:
302:
298:
295:
289:
288:
285:
281:
280:
277:
271:
270:
267:
261:
260:
257:
251:
250:
247:
241:
240:
237:
231:
230:
227:
218:
217:
216:Sub-conchoidal
214:
208:
207:
204:
198:
197:
194:
188:
187:
184:
180:
179:
176:
170:
169:
168:Identification
165:
164:
161:
155:
154:
149:
143:
142:
118:
112:
111:
106:
104:Crystal system
100:
99:
96:
90:
89:
86:
80:
79:
76:
70:
69:
65:
61:
58:
48:
47:
42:
38:
37:
33:
32:
24:
23:
15:
13:
10:
9:
6:
4:
3:
2:
535:
524:
521:
519:
516:
514:
511:
510:
508:
489:
485:
478:
475:
464:
460:
454:
451:
440:
436:
430:
427:
422:
418:
413:
408:
404:
400:
396:
392:
388:
381:
378:
372:
370:
368:
364:
360:
355:
346:
342:
338:
336:
332:
328:
326:
322:
319:0.020 – 0.032
318:
316:
315:Birefringence
312:
296:
294:
290:
286:
282:
278:
276:
272:
268:
266:
262:
258:
256:
252:
248:
246:
242:
238:
236:
232:
228:
223:
219:
215:
213:
209:
205:
203:
199:
195:
193:
192:Crystal habit
189:
185:
181:
177:
175:
171:
166:
162:
160:
156:
153:
150:
148:
144:
140:
136:
132:
128:
123:
119:
117:
116:Crystal class
113:
110:
107:
105:
101:
97:
95:
91:
87:
85:
81:
77:
75:
71:
59:
53:
49:
46:
43:
39:
34:
30:
25:
20:
491:. Retrieved
487:
477:
466:. Retrieved
462:
453:
442:. Retrieved
438:
429:
394:
390:
380:
363:hydrothermal
354:Mansfieldite
353:
352:
174:Formula mass
151:
138:
134:
130:
121:
109:Orthorhombic
22:Mansfieldite
287:Biaxial (+)
255:Diaphaneity
147:Space group
98:40.04.01.04
507:Categories
493:2021-06-22
468:2021-06-22
444:2021-06-22
373:References
335:Dispersion
222:Mohs scale
127:H-M symbol
74:IMA symbol
421:235729616
359:scorodite
178:201.93 gm
159:Unit cell
325:2V angle
239:Vitreous
225:hardness
212:Fracture
202:Cleavage
163:876.8 ų
88:08.CD.10
41:Category
399:Bibcode
275:Density
52:Formula
45:Mineral
36:General
419:
347:Cobalt
245:Streak
235:Luster
417:S2CID
249:White
229:3.5–4
183:Color
129:: (2/
60:AlAsO
339:None
279:3.03
269:3.03
152:Pbca
407:doi
122:mmm
78:Mfd
64:·2H
509::
486:.
461:.
437:.
415:.
405:.
395:85
393:.
389:.
137:2/
133:2/
124:)
496:.
471:.
447:.
423:.
409::
401::
307:γ
303:β
299:α
297:n
141:)
139:m
135:m
131:m
68:O
66:2
62:4
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
