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Byströmite

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Formula:
MgSb25+O6
System:
Tetragonal
Colour:
Bluish-grey
Lustre:
Earthy
Hardness:
7
Name:
Named for Anders Byström (1916-1956), Swedish crystal chemist.

Classification of Byströmite

Approved, 'Grandfathered' (first described prior to 1959)
4.DB.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
Dana 7th ed.:
44.2.1.1
44.2.1.1

44 : ANTIMONATES
2 : AX2O6
24.2.2

24 : Antimonates and Antimonites
2 : Antimonates of Be, Mg, Ca, Zn or Hg

Physical Properties of Byströmite

Earthy
Colour:
Bluish-grey
Streak:
light gray
Hardness (Mohs):
7
Density:
5.5(1) g/cm3 (Measured)    5.8 g/cm3 (Calculated)
Comment:
measured pure material probably 5.7

Optical Data of Byströmite

Type:
Uniaxial

Chemical Properties of Byströmite

IMA Formula:
MgSb25+O6
Elements listed in formula:

Crystallography of Byströmite

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P4/nmm
Cell Parameters:
a = 4.68Å, c = 9.21Å
Ratio:
a:c = 1 : 1.968
Unit Cell Volume:
V 201.72 ų (Calculated from Unit Cell)
Z:
2
Comment:
P4/mnm

Type Occurrence of Byströmite

General Appearance of Type Material:
massive
Geological Setting of Type Material:
oxidation zone
Associated Minerals at Type Locality:

Relationship of Byströmite to other Species

4.DB.05ArgutiteGeO2
4.DB.05CassiteriteSnO2
4.DB.05PlattneritePbO2
4.DB.05PyrolusiteMnO2
4.DB.05RutileTiO2
4.DB.05TripuhyiteFe3+Sb5+O4
4.DB.05TugarinoviteMoO2
4.DB.05Varlamoffite(Sn,Fe)(O,OH)2
4.DB.10Tapiolite-(Fe)Fe2+Ta2O6
4.DB.10Tapiolite-(Mn)Mn2+Ta2O6
4.DB.10OrdoñeziteZnSb25+O6
4.DB.15bAkhtenskiteMnO2
4.DB.15cNsutiteMnx2+Mn4+1-xO2-2x(OH)2x
4.DB.15aParamontroseiteVO2
4.DB.15aRamsdelliteMn4+O2
4.DB.20ScrutinyitePbO2
4.DB.25Ishikawaite(U,Fe,Y)NbO4
4.DB.25Ixiolite(Ta,Mn,Nb)O2
4.DB.25Samarskite-(Y)(Y,Ce,U,Fe,Nb)(Nb,Ta,Ti)O4
4.DB.25SrilankiteTi2ZrO6
4.DB.25Yttrocolumbite-(Y)(Y,U,Fe2+)(Nb,Ta)O4
4.DB.25Calciosamarskite(Ca,Fe,Y)(Nb,Ta,Ti)O4
4.DB.25Samarskite-(Yb)YbNbO4
4.DB.30FerberiteFe2+WO4
4.DB.30HübneriteMn2+WO4
4.DB.30SanmartiniteZnWO4
4.DB.30KrasnoselskiteCoWO4
4.DB.30HeftetjerniteScTaO4
4.DB.30HuanzalaiteMgWO4
4.DB.35Columbite-(Fe)Fe2+Nb2O6
4.DB.35Tantalite-(Fe)Fe2+Ta2O6
4.DB.35Columbite-(Mn)Mn2+Nb2O6
4.DB.35Tantalite-(Mn)Mn2+Ta2O6
4.DB.35Columbite-(Mg)MgNb2O6
4.DB.35QitianlingiteFe22+Nb2W6+O10
4.DB.35Magnocolumbite(Mg,Fe,Mn)(Nb,Ta)2O6
4.DB.35Tantalite-(Mg)MgTa2O6
4.DB.40FerrowodginiteFe2+Sn4+Ta2O8
4.DB.40LithiotantiteLiTa3O8
4.DB.40LithiowodginiteLiTa3O8
4.DB.40TitanowodginiteMn2+TiTa2O8
4.DB.40WodginiteMn2+Sn4+Ta2O8
4.DB.40FerrotitanowodginiteFe2+TiTa2O8
4.DB.40WolframowodginiteMn(Mn,Sn,Fe,Ta)(W,Ta,Nb)2O8
4.DB.45TivaniteTiV3+O3(OH)
4.DB.50Carmichaelite(Ti,Cr,Fe)(O,OH)2
4.DB.55AlumotantiteAlTaO4
4.DB.60BiehliteSb23+MoO6
24.2.1SwedenborgiteNaBe4Sb5+O7
24.2.3Roméite Group
24.2.4OrdoñeziteZnSb25+O6
24.2.5TheisiteCu5Zn5As2O8(OH)14
24.2.6ShakhoviteHg41+Sb5+O3(OH)3

Other Names for Byströmite

Name in Other Languages:

Other Information

Other Information:
dissolve completely in concentrated HCl containing KI as a reducing agent.
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 Byströmite

Reference List:
Mason B, Vitaliano C J (1952) Bystromite, magnesium antimonate, a new mineral. American Mineralogist 37, 53-57

Panczner (1987), Minerals of Mexico: 126.

Internet Links for Byströmite

mindat.org URL:
https://www.mindat.org/min-814.html
Please feel free to link to this page.

Localities for Byströmite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Germany
 
  • Bavaria
    • Franconia
      • Fichtelgebirge
        • Brandholz - Goldkronach District
Meier, S. (1995). Mineralfundstellen im Fichtelgebirge. Eigenverlag, Marktredwitz, 220 p.
Mexico (TL)
 
  • Sonora
    • Mun. de Caborca
      • El Antimonio
American Mineralogist, (1952) 37, 53-57; Panczner (1987):126.
Handbook of Mineralogy
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