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Magnesiohulsite

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About MagnesiohulsiteHide

Formula:
(Mg,Fe2+)2(Fe3+,Sn,Mg)(BO3)O2
Colour:
Black, bluish-grey, greyish white in reflect light.
Hardness:
6
Crystal System:
Monoclinic
Name:
For its relation to hulsite.
The magnesium analogue of Hulsite and the Fe3+ analogue of Alumino-Magnesiohulsite.


Classification of MagnesiohulsiteHide

Approved
Approval Year:
1983
6.AB.45

6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
24.2.3.2

24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
9.6.5

9 : Borates
6 : Borates of Ti, Sn and Ta

Physical Properties of MagnesiohulsiteHide

Colour:
Black, bluish-grey, greyish white in reflect light.
Hardness:

Optical Data of MagnesiohulsiteHide

Type:
Biaxial
RI values:
nα = 1.880 nγ = 1.950
Max Birefringence:
δ = 0.070
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong

Chemical Properties of MagnesiohulsiteHide

Formula:
(Mg,Fe2+)2(Fe3+,Sn,Mg)(BO3)O2
IMA Formula:
Mg2Fe3+O2(BO3)

Crystallography of MagnesiohulsiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 10.7 Å, b = 3.06 Å, c = 5.45 Å
β = 94.6°
Ratio:
a:b:c = 3.497 : 1 : 1.781
Unit Cell V:
177.87 ų (Calculated from Unit Cell)

Type Occurrence of MagnesiohulsiteHide

Synonyms of MagnesiohulsiteHide

Other Language Names for MagnesiohulsiteHide

Simplified Chinese:黑硼锡镁矿
Traditional Chinese:黑硼錫鎂礦

Relationship of Magnesiohulsite to other SpeciesHide

Other Members of this group:
Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2Mon. 2/m
FolvikiteSb5+Mn3+(Mg,Mn2+)10O8(BO3)4Mon. 2 : P2
Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2Mon.
Pinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Mon.

Related Minerals - Nickel-Strunz GroupingHide

6.AB.05HambergiteBe2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
6.AB.10BerboriteBe2(BO3)(OH,F) · H2OTrig.
6.AB.15JeremejeviteAl6(BO3)5(F,OH)3Hex. 6/m : P63/m
6.AB.20Warwickite(Mg,Ti,Fe,Cr,Al)2O(BO3)Orth.
6.AB.20YuanfuliiteMg(Fe3+,Al)O(BO3)Orth.
6.AB.25KarliteMg7(BO3)3(OH,Cl)5Orth.
6.AB.30Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2Orth.
6.AB.30BonaccorditeNi2Fe3+(BO3)O2Orth.
6.AB.30FredrikssoniteMg2(Mn3+,Fe3+)(BO3)O2Orth.
6.AB.30LudwigiteMg2Fe3+(BO3)O2Orth.
6.AB.30VonseniteFe2+2Fe3+(BO3)O2Orth.
6.AB.35Pinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Mon.
6.AB.40BlatteriteSb5+(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
6.AB.40ChestermaniteMg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2Orth.
6.AB.40Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.
6.AB.40Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2Orth.
6.AB.45Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2Mon.
6.AB.45Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2Mon. 2/m
6.AB.50FluoboriteMg3(BO3)(F,OH)3Hex.
6.AB.50HydroxylboriteMg3(BO3)(OH)3Hex. 6/m : P63/m
6.AB.55ShabyniteMg5(BO3)(OH)5(Cl,OH)2 · 4H2OMon.
6.AB.55WightmaniteMg5(BO3)O(OH)5 · 2H2OMon.
6.AB.60GaudefroyiteCa4Mn3+2-3(BO3)3(CO3)(O,OH)3Hex.
6.AB.65SakhaiteCa12Mg4(BO3)7(CO3)4(OH)2ClIso. m3m (4/m 3 2/m) : Fd3m
6.AB.70HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2OTrig. 3m (3 2/m) : R3m
6.AB.75Pertsevite-(F)Mg2(BO3)(F,OH)Orth. mm2 : Pna21
6.AB.75Pertsevite-(OH)Mg2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
6.AB.80JacquesdietrichiteCu2(H2BO3)(OH)3Orth. mmm (2/m 2/m 2/m) : Pmna
6.AB.85PainiteCaZrAl9(BO3)O15Hex.

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

24.2.3.1Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.6.1Warwickite(Mg,Ti,Fe,Cr,Al)2O(BO3)Orth.
9.6.2Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2Orth.
9.6.3NordenskiöldineCaSn4+[BO3]2Trig. 3 : R3
9.6.4Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2Mon.
9.6.6Béhierite(Ta5+,Nb5+)(BO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd

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 MagnesiohulsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Yang Guangming, Peng Zhizhong, and Pan Zhaolu (1985): Magnesiohulsite - A new tin-rich borate mineral. Acta Mineralogica Sinica 5(2), 97-101 (in Chinese with English abstract). - American Mineralogist (1988), 73, 929 (abstract).
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for MagnesiohulsiteHide

Localities for MagnesiohulsiteHide

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.
China (TL)
 
  • Hunan Province
    • Hengyang Prefecture
      • Changning Co.
        • Dayishan Sn-polymetallic ore field
Yang Guangming, Peng Zhizhong, and Pan Zhaolu (1985): Acta Mineralogica Sinica 5(2), 97-101; Guangming Yang, Zhaolu Pan, and Zhizhong Peng (1987): Acta Petrologica et Mineralogica 6(3), 229-236
Russia
 
  • Far-Eastern Region
    • Chukotskii Autonomous Okrug
RRUFF Specimen ID: R070223
USA
 
  • Alaska
    • Nome Borough
      • Seward Peninsula
Aleksandrov, S.M. (1974b) Geochemical features of endogeneous borate mineralization in Italy. Geokhimiya, 5, 763-772 (in Russian. English translation::Geochemistry International, April, 1974, Vol. 10, pp. 987-996).
Mineral and/or Locality  
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