Donate now to keep mindat.org alive!Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
The most common minerals on earthMineral PhotographyThe Elements and their Minerals
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralSearch 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 ElementsMember ListBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Sturmanite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
Ca6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2O
Colour:
Bright Yellow to amber
Lustre:
Vitreous, Greasy
Hardness:
Specific Gravity:
1.847
Crystal System:
Trigonal
Name:
Named in 1983 by Donald R. Peacor, Pete J. Dunn, and Marjorie Duggan in honor of Bozidar Darko Sturman [b. 1937], Slovenian-Canadian mineralogist and former Associate Curator of Mineralogy, Royal Ontario Museum, Toronto, Ontario, for his contributions to systematic mineralogy, in particular his studies of phosphate minerals from the Yukon and his refinement of methods used in optical mineralogy.
Hide all sections | Show all sections

Classification of SturmaniteHide

Approved
Approval Year:
1981
7.DG.15

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
G : With large and medium-sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
32.4.4.2

32 : COMPOUND SULFATES
4 : Hydrated Compound Sulfates containing Hydroxyl or Halogen
25.11.23

25 : Sulphates
11 : Sulphates of Fe and other metals

Physical Properties of SturmaniteHide

Vitreous, Greasy
Transparency:
Transparent, Translucent
Comment:
Greasy on fracture surfaces.
Colour:
Bright Yellow to amber
Streak:
Pale yellow, greenish yellow, brownish orange (altered)
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{1010}
Density:
1.847 g/cm3 (Measured)    1.855 g/cm3 (Calculated)

Optical Data of SturmaniteHide

Type:
Uniaxial (+/-)
RI values:
nω = 1.499 - 1.500 nε = 1.497 - 1.505
Max Birefringence:
δ = 0.002
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Weak
Comments:
O= pale green
E= pale yellowish green

Chemical Properties of SturmaniteHide

Formula:
Ca6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2O
IMA Formula:
Ca6Fe3+2(SO4)2.5[B(OH)4](OH)12 · 25H2O

Crystallography of SturmaniteHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
P3 1c
Cell Parameters:
a = 11.16(3) Å, c = 21.79(9) Å
Ratio:
a:c = 1 : 1.953
Unit Cell V:
2,350.26 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Dipyramidal tabular to elongated hexagonal crystals
Twinning:
Probably
Comment:
Pushcharovsky et al. (2004) give: a 11.188(9), c 21.91(7) Å, V 2375.1(5) Å3.

Type Occurrence of SturmaniteHide

Synonyms of SturmaniteHide

Other Language Names for SturmaniteHide

Relationship of Sturmanite to other SpeciesHide

Other Members of this group:
BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
BuryatiteCa3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5 · 12H2O
CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2OHex.
CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2OTrig. 3m : P3 1c
EttringiteCa6Al2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
HielscheriteCa3Si(SO4)(SO3)(OH)6 · 11H2OHex. 6 : P63
ImayoshiiteCa3Al(CO3)[B(OH)4](OH)6 · 12H2OHex. 6 : P63
JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2OHex.
KottenheimiteCa 3Si(SO4)2(OH)6·12H2O Hex. 6/m : P63/m
Micheelsenite(Ca,Y)3Al(HPO4,CO3)(CO3)(OH)6 · 12H2OHex.
TatarinoviteСа3Al(SO4)[B(OH)4](OH)6·12H2OHex. 6 : P63
ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite32 photos of Sturmanite associated with Calcite on mindat.org.
Manganite23 photos of Sturmanite associated with Manganite on mindat.org.
Brucite15 photos of Sturmanite associated with Brucite on mindat.org.
Andradite9 photos of Sturmanite associated with Andradite on mindat.org.
Ettringite8 photos of Sturmanite associated with Ettringite on mindat.org.
Charlesite7 photos of Sturmanite associated with Charlesite on mindat.org.
Hematite7 photos of Sturmanite associated with Hematite on mindat.org.
Quartz7 photos of Sturmanite associated with Quartz on mindat.org.
Hausmannite5 photos of Sturmanite associated with Hausmannite on mindat.org.
Hydroxyapophyllite-(K)3 photos of Sturmanite associated with Hydroxyapophyllite-(K) on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

7.DG.05DarapskiteNa3(SO4)(NO3) · H2OMon. 2/m
7.DG.10Clinoungemachite(Na, K, Fe, SO4)Mon. 2/m
7.DG.10HumberstoniteNa7K3Mg2(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
7.DG.10UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
7.DG.15BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.DG.15CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2OTrig. 3m : P3 1c
7.DG.15EttringiteCa6Al2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
7.DG.15JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2OHex.
7.DG.15ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
7.DG.15CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2OHex.
7.DG.15BuryatiteCa3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5 · 12H2O
7.DG.20RapidcreekiteCa2(SO4)(CO3) · 4H2OOrth.
7.DG.20KorkinoiteCa4(SO4)2(CO3)2 · 9(H2O)Orth. mmm (2/m 2/m 2/m) : Pmmm
7.DG.25TatarskiteCa6Mg2(SO4)2(CO3)2(OH)4Cl4 · 7H2OOrth.
7.DG.30NakauriiteCu8(SO4)4(CO3)(OH)6 · 48H2OOrth.
7.DG.35Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
7.DG.40CarlosruiziteK6(Na,K)4Na6Mg10(SeO4)12(IO3)12 · 12H2OTrig. 3m (3 2/m) : P3c1
7.DG.40FuenzalidaiteK6(Na,K)4Na6Mg10(SO4)12(IO3)12 · 12H2OTrig. 3m (3 2/m) : P3c1
7.DG.45Chelyabinskite(Ca,Mg)3(SO4,CO3)2[Si(OH)6] · 9H2O (?)Orth.

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

32.4.4.1CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2OTrig. 3m : P3 1c
32.4.4.3JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2OHex.
32.4.4.4ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
32.4.4.6CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2OHex.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.11.1NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
25.11.2SideronatriteNa2Fe(SO4)2(OH) · 3H2OOrth. 2 2 2 : P21 21 21
25.11.3MetasideronatriteNa2Fe(SO4)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
25.11.4FerrinatriteNa3Fe(SO4)3 · 3H2OTrig. 3 : P3
25.11.5AmarilliteNaFe(SO4)2 · 6H2OMon. 2/m : B2/b
25.11.6YavapaiiteKFe(SO4)2Mon. 2/m : B2/m
25.11.7KrausiteKFe(SO4)2 · H2OMon. 2/m : P21/m
25.11.8GoldichiteKFe(SO4)2 · 4H2OMon. 2/m : P21/b
25.11.9JarositeKFe3+ 3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
25.11.10VoltaiteK2Fe2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
25.11.11UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
25.11.12MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2OTrig.
25.11.13Sabieite(NH4)Fe3+(SO4)2Trig. 3 2 : P3 2 1
25.11.14Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
25.11.15Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2OTric.
25.11.16Mohrite(NH4)2Fe(SO4)2 · 6H2OMon. 2/m : P21/b
25.11.17Lonecreekite(NH4)Fe3+(SO4)2 · 12H2OIso.
25.11.18Godovikovite(NH4)Al(SO4)2Trig. 3 2 : P3 2 1
25.11.19BotryogenMgFe3+(SO4)2(OH) · 7H2OMon. 2/m
25.11.21Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2OTrig. 3 : R3
25.11.24Millosevichite(Al,Fe)2(SO4)3Tric.
25.11.25AluminocopiapiteAl2/3Fe3+4(SO4)6(OH)2 · 20H2OTric. 1 : P1
25.11.26HalotrichiteFeAl2(SO4)4 · 22H2OMon. 2 : P2
25.11.27Idrizite(Mg,Fe)(Al,Fe)2(SO4)3(OH)2 · 15H2O or near
25.11.28LishizheniteZnFe2(SO4)4 · 14H2OTric. 1 : P1
25.11.29ZincovoltaiteK2Zn5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c

Other InformationHide

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 SturmaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Peacor, D.R., Dunn, P.J., Duggan, M. (1983) Sturmanite, a ferric iron, boron analogue of ettringite. The Canadian Mineralogist: 21: 705-709.
Pushcharovsky, D.Yu., Lebedeva, Yu,S., Zubkova, N.V., Pasero, M., Bellezza, M., Merlino, S., Chukanov, N.V. (2004) The crystal structure of sturmanite. The Canadian Mineralogist: 42: 723-729.
Hochleitner, R. (1986) Sturmanit und Ettringit aus den Kalahari-Manganfeldern. Lapis: 10(10): 19-24.
Von Benzig, K.L., Dixon, R.D., Pohl, D., Cavallo, G. (1991) The Kalahari manganese field: An update. Mineralogical Record: 22: 292-293.
Weiner, K.L., Hochleitner, R. (1994) Sturmanit - Steckbrief. Lapis: 19(2): 9-11.
Cairncross, B., Dixon, R. (1995) Minerals of South Africa. Published by The Geological Society of South Africa, Johannesburg, 60-66 and 244-245.
Grew, E.S., Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for SturmaniteHide

Localities for SturmaniteHide

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.
Russia
 
  • Northern Caucasus Region
    • Kabardino-Balkarian Republic
      • Baksan Valley
        • Upper Chegem volcanic caldera (Verkhnechegemskaya caldera)
A. E. Zadov data
South Africa (TL)
 
  • Northern Cape Province
    • Kalahari manganese field
      • Black Rock
PEACOR, D.R., DUNN, P.J. & DUGGAN, M. (1983): Sturmanite, a ferric iron, boron analogue of ettringite. Canadian Mineralogist 21, 705-709. HOCHLEITNER, R. (1986): Sturmanit und Ettringit aus den Kalahari-Manganfeldern. Lapis, Jg. 10, Nr. 10, 19-24. VON BENZIG, K.L., DIXON, R.D., POHL, D. & CAVALLO, G. (1991): The Kalahari manganese field: An update. Mineralogical Record 22, 292-293. CAIRNCROSS, B. & DIXON, R. (1995): Minerals of South Africa. Published by The Geological Society of South Africa, Johannesburg, 60-66 and 244-245.
      • Hotazel
Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) 279-302;
      • Kuruman
        • N'Chwaning Mines
No reference listed
Minerals of South Africa + Hochleitner, R. (1986). Sturmanit und Ettringit aus den Kalahari-Manganfeldern; Lapis: 11(10): 19-24; Bonazzi, P., Bindi, L., Medenbach, O., Pagano, R., Lampronti, Menchetti, S. (2007): Olmiite, CaMn[SiO3(OH)](OH), the Mn-dominant analogue of poldervaartite, a new mineral species from Kalahari manganese fields (Republic of South Africa), Mineralogical Magazine, 71, 193-291.
Van King
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 1993-2017, 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: November 18, 2017 21:18:14 Page generated: November 8, 2017 00:19:21
Go to top of page