IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
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 Educators
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
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Derbylite

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

About DerbyliteHide

Orville Adelbert Derby
Formula:
Fe3+4Ti3Sb3+O13(OH)
Colour:
Pitch-black, dark brown (when translucent)
Lustre:
Sub-Adamantine, Resinous, Metallic
Hardness:
5
Specific Gravity:
4.53 - 4.62
Crystal System:
Monoclinic
Name:
After American geologist Orville Adelbert Derby [July 23, 1851 Kellogsville, New York - November 27, 1915 Rio de Janeiro, Brazil), former Director, Brazilian Geological Survey.


Compare batisivite.


Classification of DerbyliteHide

Approved, 'Grandfathered' (first described prior to 1959)
4.JB.55

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
46.2.3.2

46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
2 : Miscellaneous
24.3.2

24 : Antimonates and Antimonites
3 : Antimonates of Ti and Pb

Physical Properties of DerbyliteHide

Sub-Adamantine, Resinous, Metallic
Transparency:
Opaque
Colour:
Pitch-black, dark brown (when translucent)
Streak:
Brown
Hardness:
Hardness:
VHN100=1033 - 1121 kg/mm2 - Vickers
Tenacity:
Very brittle
Cleavage:
None Observed
Fracture:
Conchoidal, Sub-Conchoidal
Density:
4.53 - 4.62 g/cm3 (Measured)    4.76 g/cm3 (Calculated)

Optical Data of DerbyliteHide

Type:
Biaxial (+)
RI values:
nα = 2.450 nβ = 2.450 nγ = 2.510
Birefringence:
0.06
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Type:
Anisotropic
Colour in reflected light:
Gray
Internal Reflections:
Bluish green
Pleochroism:
Non-pleochroic

Chemical Properties of DerbyliteHide

Formula:
Fe3+4Ti3Sb3+O13(OH)
IMA Formula:
Fe3+4Ti4+3Sb3+O13(OH)

Crystallography of DerbyliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 7.156 Å, b = 14.347 Å, c = 4.97 Å
β = 104.69°
Ratio:
a:b:c = 0.499 : 1 : 0.346
Unit Cell V:
493.58 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals prismatic, elongated [001], exhibiting numerous forms, mostly {hk0}; small grains.
Twinning:
On {011} or {153}. Commonly as cruciform twins crossing at 57°38½', and rarely as trillings.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.00 (20)
3.83 (20)
3.19 (50)
3.12 (40)
2.85 (100)
2.67 (80)
2.48 (30)
2.39 (30)
Comments:
35-599

Type Occurrence of DerbyliteHide

General Appearance of Type Material:
Small grains and complex prismatic crystals
Place of Conservation of Type Material:
The Natural History Museum, London, England, UK: #80143.
Geological Setting of Type Material:
Cinnabar-bearing placer gravels
Associated Minerals at Type Locality:

Other Language Names for DerbyliteHide

German:Derbylit
Spanish:Derbylita

Common AssociatesHide

ApuaniteFe2+Fe3+4Sb3+4O12S
BaryteBaSO4
BournonitePbCuSbS3
DolomiteCaMg(CO3)2
PyriteFeS2
SchafarzikiteFe2+Sb3+2O4
SphaleriteZnS
VersiliaiteFe2Fe4Sb6O16S
Associated Minerals Based on Photo Data:
Dolomite2 photos of Derbylite associated with Dolomite on mindat.org.
Calcite1 photo of Derbylite associated with Calcite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.JB.05Fetiasite(Fe3+,Fe2+,Ti)3(As2O5)O2Mon.
4.JB.10ManganarsiteMn3(As2O4)(OH)4
4.JB.15MagnussoniteMn10As6O18(OH,Cl)2Iso. m3m (4/m 3 2/m) : Ia3d
4.JB.15UM1984-09-AsO:ClHMnMn10As6O18(OH)ClTet. 4/mmm (4/m 2/m 2/m) : I41/acd
4.JB.20ArmangiteMn2+26(AsO3)14(HAsO3)4(CO3)Trig. 3 : P3
4.JB.25NanlingiteNa(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14Trig.
4.JB.30AsbecasiteCa3(Ti,Sn4+)Be2(AsO3)6(SiO4)2Trig. 3m : P3c1
4.JB.35StenhuggariteCaFeSb(AsO3)2OTet.
4.JB.40TrigonitePb3Mn2+(AsO3)2(HAsO3)Mon. m
4.JB.45FinnemanitePb5(AsO3)3ClHex. 6/m : P63/m
4.JB.50GebharditePb8(As2O5)2OCl6Mon.
4.JB.55Tomichite(V,Fe)4Ti3AsO13(OH)Mon.
4.JB.55Graeserite(Fe3+ ,Ti)4Ti3AsO13(OH)Mon.
4.JB.60Hemloite(Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH)Tric. 1 : P1
4.JB.65FreediteCu+Pb8(AsO3)2O3Cl5Mon. 2/m : B2/m
4.JB.70GeorgiadèsitePb4(AsO3)Cl4(OH)Mon.
4.JB.75Ekatite(Fe3+,Fe2+,Zn)12(AsO3)6(AsO3,HSiO4)2(OH)6Hex.

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

46.2.3.1Tomichite(V,Fe)4Ti3AsO13(OH)Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

24.3.3Hemloite(Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH)Tric. 1 : P1
24.3.4NadoritePbSbClO2Orth. mmm (2/m 2/m 2/m) : Cmcm
24.3.5BindheimitePb2Sb2O6OIso. m3m (4/m 3 2/m) : Fd3m
24.3.6MonimolitePb2Sb5+2O7Iso. m3m (4/m 3 2/m)
24.3.7ThorikositePb3Cl2(OH)(SbO3,AsO3)Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm

Fluorescence of DerbyliteHide

Not fluorescent

Other InformationHide

Notes:
Not soluble in acids. Decomposed by fusion in KHSO4.
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 DerbyliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hussak, E., Prior, G.T. (1897) On derbylite, a new antimono-titanate of iron from Tripuhy, Brazil. Mineralogical Magazine: 11: 176-179.
Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 147.
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.: 1025-1026.
Moore, P. B., Araki T. (1976) Derbylite, Fe3+ 4, Ti4+ 3 Sb3+ O13 (OH), a novel close-packed oxide structure. Neues Jahrb. Mineral. Abh., 126: 292-303.
American Mineralogist (1977): 62: 396 (abstract).
Mellini M., Orlandi P., Perchiazzi N. (1983): Derbylite from Buca della Vena mine, Apuan Alps, Italy. Canadian Mineralogist: 21: 513-516.
Criddle, A.J. and C.J. Stanley, Eds. (1993) Quantitative data file for ore minerals, 3rd ed. Chapman & Hall, London, 138.

Internet Links for DerbyliteHide

Localities for DerbyliteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Brazil (TL)
 
  • Minas Gerais
    • Ouro Preto
      • Main district
Mineralogical Magazine (1895): 11: 85; Mineralogical Magazine (1897): 11: 176; 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: 1026.; Hussak and Prior (1900) Mineralogical Magazine: 12: 244.
Italy
 
  • Tuscany
    • Lucca Province
      • Apuan Alps
        • Stazzema
          • Ponte Stazzemese
Mellini M., Orlandi P., Vezzalini G (1986).: V-derbylite from Buca della Vena mine. Apuan Alps Italy . Mineralogical Magazine, 50, 328-330.
          • Sant'Anna di Stazzema
Biagioni, C., Bonaccorsi, E., Capalbo, C., Merlino, S., Orlandi, P., Pasero, M. & Perchiazzi, N. (2013) Cinque anni di ricerche mineralogichesulle Alpi Apuane - Sinergia fra collezionismo e ricerca scientifica. Giornate di Studio GNM “Nuovi minerali: tra ricerca e collezionismo” Padova, 18 giugno 2013, 48 pp.
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: October 16, 2018 05:07:04 Page generated: September 29, 2018 00:04:19
Go to top of page