ALMOST THERE!. Help us with a final push needed to keep mindat.org running. Click here to help.
Catawiki are hosting a mindat.org benefit auction. All proceeds to mindat.org! BID NOW
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Melanovanadite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About MelanovanaditeHide

Formula:
Ca(V5+,V4+)4O10 · 5H2O
Colour:
Black; dark reddish brown in transmitted light
Lustre:
Sub-Metallic
Hardness:
Specific Gravity:
2.55
Crystal System:
Triclinic
Name:
From the Greek for "black," in allusion to its colour, and in allusion to its composition, containing VANADium.
A secondary mineral occurring in Colorado Plateau-type U-V deposits and in altered black shale in a very rich vanadium deposit (TL). Contains interlayer H2O which is easily displaced.


Classification of MelanovanaditeHide

Approved, 'Grandfathered' (first described prior to 1959)
4.HE.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
47.3.6.1

47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
21.2.10

21 : Vanadates (and vanadates with arsenate or phosphate)
2 : Vanadates of Mg, Ca, Sr or Ba

Physical Properties of MelanovanaditeHide

Sub-Metallic
Transparency:
Opaque
Colour:
Black; dark reddish brown in transmitted light
Streak:
Dark reddish brown
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {010}, perfect.
Density:
2.55 g/cm3 (Measured)    2.53 g/cm3 (Calculated)

Optical Data of MelanovanaditeHide

Type:
Biaxial (-)
RI values:
nα = 1.730 nβ = 1.960 nγ = 1.980
Max Birefringence:
δ = 0.250
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
relatively strong
Pleochroism:
Visible
Comments:
X = Light reddish brown
Y ^ c 15° = Deep reddish brown
Z = b = Dark reddish brown
Comments:
2V = medium.

Chemical Properties of MelanovanaditeHide

Formula:
Ca(V5+,V4+)4O10 · 5H2O

Crystallography of MelanovanaditeHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 6.36 Å, b = 18.09 Å, c = 6.276 Å
α = 110.18°, β = 101.62°, γ = 82.86°
Ratio:
a:b:c = 0.352 : 1 : 0.347
Unit Cell V:
662.67 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals prismatic, striated and elongated [001], with prominent but rounded prism zone and complexly terminated; radiating aggregates and rosettes; velvety.

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of MelanovanaditeHide

Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA: #90452. American Museum of Natural History, New York, New York, USA: #19310. U.S. National Museum of Natural History, Washington, D.C., USA: #138067, 160076.
Geological Setting of Type Material:
Altered black shale in a very rich vanadium deposit
Associated Minerals at Type Locality:

Other Language Names for MelanovanaditeHide

Common AssociatesHide

DuttoniteV4+O(OH)2

Related Minerals - Nickel-Strunz GroupingHide

4.HE.10ShcherbinaiteV5+2O5Orth. mmm (2/m 2/m 2/m) : Pmmn
4.HE.15HewettiteCaV6O16 · 9H2OMon. 2/m : P21/m
4.HE.15MetahewettiteCaV6O16 · 3H2OMon. 2/m
4.HE.20BarianditeAl0.6(V5+,V4+)8O20 · 9H2OMon.
4.HE.20Bokite(Al,Fe3+)1.3(V5+,V4+,Fe3+)8O20 · 7.4H2OMon.
4.HE.20Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2OMon.
4.HE.20Fernandinite(Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2OMon. 2/m : B2/m
4.HE.20Straczekite(Ca,K,Ba)(V5+,V4+)8O20 · 3H2OMon.
4.HE.25HäggiteV3+V4+O2(OH)3Mon.
4.HE.30DoloresiteV4+3O4(OH)4Mon.
4.HE.35DuttoniteV4+O(OH)2Mon. 2/m
4.HE.40CavoiteCaV4+3O7Orth. mmm (2/m 2/m 2/m) : Pnma

Related Minerals - Dana Grouping (8th Ed.)Hide

47.3.6.3MagnesiopascoiteCa2Mg(V10O28) · 16H2OMon. 2/m : B2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

21.2.1MetarossiteCa(V2O6) · 2H2OTric. 1 : P1
21.2.2RossiteCa(VO3)2•4H2OTric. 1 : P1
21.2.3MetahewettiteCaV6O16 · 3H2OMon. 2/m
21.2.4HewettiteCaV6O16 · 9H2OMon. 2/m : P21/m
21.2.5PintadoiteCa2(V2O7) · 9H2O
21.2.6Hendersonite(Ca,Sr)1.3V6O16 · 6H2OOrth.
21.2.7Fernandinite(Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2OMon. 2/m : B2/m
21.2.8PascoiteCa3(V10O28) · 17H2OMon. 2 : B2
21.2.9SherwooditeCa4.5(AlV4+2V5+12O40) · 28H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
21.2.11Grantsite(Na,Ca)2+x(V5+,V4+)6O16 · 4H2OMon.
21.2.12HummeriteK2Mg2(V10O28) · 16H2OTric.
21.2.13MetadelrioiteCaSr(V2O6)(OH)2Tric.
21.2.14DelrioiteCaSr(V2O6)(OH)2 · 3H2OMon.
21.2.15Straczekite(Ca,K,Ba)(V5+,V4+)8O20 · 3H2OMon.
21.2.16GamagariteBa2Fe3+(VO4)2(OH)Mon. 2/m : P21/m

Other InformationHide

Notes:
Readily soluble in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for MelanovanaditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lindgren (1921) Proceedings of the National Academy of Science: 7: 249.
Lindgen, W., Hamilton, and Palache (1922) American Journal of Science: 3: 195.
American Mineralogist (1922): 7: 163.
Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848: 206.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1059-1060.
Bayliss, P. and J.M. Hughes (1985) X-ray diffraction data for melanovanadite. American Mineralogist: 70: 644–645.
Konnert, J.A. and H.T. Evans, Jr. (1987) Crystal structure and crystal chemistry of melanovanadite, a natural vanadium bronze. American Mineralogist: 72: 637-644.
Evans, H.T., Jr. and J.M. Hughes (1990) Crystal chemistry of the natural vanadium bronzes. American Mineralogist: 75: 508–521.

Internet Links for MelanovanaditeHide

Localities for MelanovanaditeHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • Pardubice Region
Sejkora J., Škácha P., Venclík V., Plášil J. (2013): Vanad-uranová mineralizace v lomu Prachovice (Česká republika) [anadium-uranium mineralization in the Prachovice quarry (Czech Republic)]. Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 21, 113-130.
Gabon
 
  • Haut-Ogooué Province
    • Franceville
J. Geffroy, J.A. Sarcia, J. Chervet : "Les Minéraux Uranifères Français", 1960, Institut National des Sciences et Techniques Nucléaires / Saclay - PUF.
Peru (TL)
 
  • Pasco Department
    • Pasco Province
      • Huayllay District
Proceedings of the National Academy of Science (1921): 7(8): 249-251; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1060.; Handbook of Mineralogy
USA
 
  • Arizona
    • Apache Co.
      • Lukachukai Mts
Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp1243-267
Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 78.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 292; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 78.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 292; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 78.
  • Colorado
    • Garfield Co.
      • East Rifle Creek area
Minerals of Colorado (1997) Eckel, E. B.
    • Montrose Co.
      • Uravan District
        • Bull Canyon
USGS Prof Paper 320
        • Paradox Valley
Minerals of Colorado (1997) Eckel, E. B.
USGS Prof Paper 320
Collected by and in the collection of Brent Thorne.
Minerals of Colorado (1997) E.B. Eckel
  • Utah
    • Grand Co.
      • Polar Mesa District (Polar Mesa)
Collected by and in the collection of Brent Thorne.
Collection of Joe Marty
      • Thompsons District (S. E. Thomsons)
UGMS Bull 117 Minerals and Mineral Localities of Utah
        • Yellow Cat Mesa
Kasatkin, A.V., Plášil, J., Marty, J., Belakovskiy, D.I., Lykova, I.S. (2014): Nestolaite, CaSeO3·H2O, a new mineral from the Little Eva mine, Grand County, Utah, USA. Mineralogical Magazine, 78, 497-505.
      • Wilson Mesa
Handbook of Mineralogy
    • San Juan Co.
      • La Sal District (Paradox Valley District)
        • La Sal
UGMS Bull 117 Minerals and Mineral Localities of Utah
        • Lion Canyon
UGMS Bull 117 Minerals and Mineral Localities of Utah
Collected by and in the collection of Chuck Adan.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: December 10, 2018 13:29:43 Page generated: October 26, 2018 02:32:56
Go to top of page