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distinctive, almost always a rich, bright blue. The color is the same as its dimorph, pentagonite, but the latter is generally much more spikey with bladed crystals. Finally, the associated minerals are useful for identification, as cavansite is frequently found sitting atop a matrix of zeolites or apophyllites.
562:
Cavansite is a distinctive mineral. It tends to form crystal aggregates, generally in the form of balls, up to a couple centimeters in size. Sometimes, the balls are coarse enough to allow the individual crystals to be seen. Rarely, cavansite forms bowtie-shaped aggregates. The color of cavansite is
406:, and could thus be a possible ore source for the element, it is not generally considered an ore mineral. However, because of its rich color and relative rarity, cavansite is a sought-after collector's mineral.
707:
Staples, L.W., Evans, H.T. Jr., and
Lindsay, J.R., "Cavansite and pentagonite, new dimorphous calcium vanadium silicate minerals from Oregon", American Mineralogist, Vol. 58, pg 405–411, 1973.
704:
Makki, M.F., "Collecting cavansite in the
Wagholi quarry complex, Pune, Maharashtra, India", The Mineralogical Record, Vol. 36, No. 6, pg. 507–512, Nov-Dec 2005.
696:
628:
745:
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202:
235:
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Evans, H.T. Jr., "The crystal structure of cavansite and pentagonite", American
Mineralogist, Vol. 58, pg. 412–424, 1973.
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minerals. Its blue coloring comes from vanadium, a metal ion. Discovered in 1967 in
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Radiating acicular prismatic crystals commonly as spherulitic rosettes
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374:, cavansite is a relatively rare mineral. It is
709:http://www.minsocam.org/ammin/AM58/AM58_405.pdf
354:mineral, occurring as a secondary mineral in
8:
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326:, named for its chemical composition of
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664:, Mineralogy Database webmineral.com
582:"IMA–CNMNC approved mineral symbols"
154:c = 9.629(2) Å; Z = 4
167:Brilliant sky-blue to greenish blue
14:
382:. It is most frequently found in
719:
675:"Minerals Colored by Metal Ions"
300:Visible: X=Z= colorless Y= blue
27:
546:cavansite, 3.6 x 2.1 x 1.8 cm,
362:rocks along with a variety of
1:
378:with the even rarer mineral,
402:Although cavansite contains
782:
746:Minerals in space group 62
344:, is a deep blue hydrous
26:
679:minerals.gps.caltech.edu
535:Notes for identification
33:Cavansite on heulandite
662:Cavansite Mineral Data
640:Handbook of Mineralogy
586:Mineralogical Magazine
559:
392:large igneous province
152:b = 13.644(3) Å,
16:Phyllosilicate mineral
751:Orthorhombic minerals
728:at Wikimedia Commons
542:
150:a = 9.792(2) Å,
426:group, particularly
386:, India, and in the
607:10.1180/mgm.2021.43
598:2021MinM...85..291W
580:Warr, L.N. (2021).
410:Associated minerals
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255:Optical properties
123:Dipyramidal (mmm)
766:Vanadyl compounds
761:Vanadium minerals
724:Media related to
697:Mineral galleries
398:Uses of cavansite
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741:Calcium minerals
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264:Refractive index
246:Specific gravity
220:Vitreous, pearly
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59:(repeating unit)
48:Silicate mineral
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756:Phyllosilicates
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629:Mineralienatlas
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128:: (2/m 2/m 2/m)
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592:(3): 291–320.
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352:phyllosilicate
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159:Identification
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107:Crystal system
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310:Measured: 52°
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286:Birefringence
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187:Good on {010}
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173:Crystal habit
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119:Crystal class
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682:. Retrieved
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433:babingtonite
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388:Deccan Traps
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323:
322:
276:= 1.544(2) n
272:= 1.542(2) n
230:Bluish-white
138:
112:Orthorhombic
556:Maharashtra
544:Stalactitic
496:pentagonite
417:apophyllite
380:pentagonite
376:polymorphic
296:Pleochroism
258:Biaxial (+)
250:2.25 - 2.33
240:Transparent
236:Diaphaneity
134:Space group
735:Categories
684:2023-02-28
567:References
315:References
280:= 1.551(2)
203:Mohs scale
126:H–M Symbol
97:IMA symbol
726:Cavansite
616:235729616
360:andesitic
324:Cavansite
290:δ = 0.009
146:Unit cell
22:Cavansite
428:stilbite
404:vanadium
356:basaltic
349:vanadium
306:2V angle
206:hardness
193:Tenacity
183:Cleavage
44:Category
594:Bibcode
558:, India
548:Wagholi
481:calcite
424:zeolite
364:zeolite
346:calcium
197:Brittle
55:Formula
39:General
651:Mindat
614:
466:quartz
372:Oregon
335:adium
331:lcium
226:Streak
216:Luster
612:S2CID
419:group
210:3 - 4
164:Color
522:· 4(
390:, a
384:Pune
358:and
339:lica
139:Pcmn
602:doi
333:van
101:Cav
83:·4(
737::
677:.
610:.
600:.
590:85
588:.
584:.
554:,
550:,
520:10
511:Si
500:Ca
498:,
488:CO
485:Ca
483:,
470:Si
468:,
461:OH
458:14
449:Si
443:Fe
437:Ca
435:,
394:.
370:,
341:te
337:si
329:ca
81:10
72:Si
68:VO
64:Ca
687:.
618:.
604::
596::
530:)
528:O
526:2
524:H
517:O
514:4
509:)
507:O
504:V
502:(
491:3
476:2
473:O
455:O
452:5
446:2
440:2
278:γ
274:β
270:α
268:n
91:)
89:O
87:2
85:H
78:O
75:4
70:)
66:(
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