Sphaerobismoite
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Formula:
Bi2O3
System:
Tetragonal
Colour:
Green, pale yellow, gray
Lustre:
Sub-Adamantine
Hardness:
4
Name:
For the form of the aggregates and the composition.
Classification of Sphaerobismoite
Approved
Approval Year:
1993
4/C.02-35
4.CB.65
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations
4.3.13.1
4 : SIMPLE OXIDES
3 : A2X3
4 : SIMPLE OXIDES
3 : A2X3
Physical Properties of Sphaerobismoite
Sub-Adamantine
Diaphaneity (Transparency):
Transparent
Colour:
Green, pale yellow, gray
Comment:
Semitransparent
Streak:
White
Hardness (Mohs):
4
Fracture:
Conchoidal
Density:
7.17 g/cm3 (Calculated)
Optical Data of Sphaerobismoite
Type:
Uniaxial (+)
RI values:
nω = 2.130 nε = 2.180
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Chemical Properties of Sphaerobismoite
Formula:
Bi2O3
Elements listed in formula:
Analytical Data:
Electron microprobe, wt.%
Bi2O3 98.40 As2O3 1.78 total 100.18
Common Impurities:
As
Crystallography of Sphaerobismoite
Crystal System:
Tetragonal
Cell Parameters:
a = 8.02 Å, c = 6.46 Å
Ratio:
a:c = 1 : 0.805
Unit Cell Volume:
V 415.51 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.16 | (100) |
| 5.73 | (70) |
| 1.902 | (60) |
| 3.44 | (50) |
| 2.02 | (50) |
Type Occurrence of Sphaerobismoite
Co-type Localities:
General Appearance of Type Material:
tabular, crystals to 20 µm, tetragonal outline possible, forming spherulitic aggregates
Geological Setting of Type Material:
oxidation product of wittichenite and emplectite
Empirical Formula:
(Bi1.92As0.08)Σ2.00O3
Relationship of Sphaerobismoite to other Species
| 4.CB.05 | Brizziite | NaSbO3 |
| 4.CB.05 | Corundum | Al2O3 |
| 4.CB.05 | Ecandrewsite | ZnTiO3 |
| 4.CB.05 | Eskolaite | Cr2O3 |
| 4.CB.05 | Geikielite | MgTiO3 |
| 4.CB.05 | Hematite | Fe2O3 |
| 4.CB.05 | Ilmenite | Fe2+Ti4+O3 |
| 4.CB.05 | Karelianite | V2O3 |
| 4.CB.05 | Melanostibite | Mn2+(Sb5+,Fe3+)O3 |
| 4.CB.05 | Pyrophanite | Mn2+TiO3 |
| 4.CB.05 | Akimotoite | MgSiO3 |
| 4.CB.05 | Auroantimonate | AuSbO3 |
| 4.CB.05 | UM1998-11-O-AuHSb | Au2+Sb3+O2(OH) |
| 4.CB.05 | Tistarite | Ti2O3 |
| 4.CB.10 | Avicennite | Tl2O3 |
| 4.CB.10 | Bixbyite | Mn23+O3 |
| 4.CB.15 | Armalcolite | (Mg,Fe2+)Ti2O5 |
| 4.CB.15 | Pseudobrookite | Fe23+TiO5 |
| 4.CB.20 | Zincohögbomite-2N2S | (Zn,Al,Fe)3(Al,Fe,Ti)8O15(OH) |
| 4.CB.20 | Zincohögbomite-2N6S | (Zn,Al)7(Al,Fe3+,Ti,Mg)16O31(OH) |
| 4.CB.20 | Magnesiohögbomite-6N6S | (Mg,Al,Fe)3(Al,Ti)8O15(OH) |
| 4.CB.20 | Magnesiohögbomite-2N3S | (Mg,Fe,Zn,Ti)4(Al,Fe)10O19(OH) |
| 4.CB.20 | Magnesiohögbomite-2N2S | (Al,Mg,Fe,Ti)22(O,OH)32 |
| 4.CB.20 | Ferrohögbomite-6N12S | [(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6 |
| 4.CB.25 | Pseudorutile | Fe23+Ti34+O9 |
| 4.CB.25 | Kleberite | FeTi6O11(OH)5 |
| 4.CB.30 | Berdesinskiite | V23+TiO5 |
| 4.CB.30 | Oxyvanite | V3O5 |
| 4.CB.35 | Olkhonskite | Cr2Ti3O9 |
| 4.CB.35 | Schreyerite | V23+Ti34+O9 |
| 4.CB.40 | Kamiokite | Fe22+Mo34+O8 |
| 4.CB.40 | Nolanite | (V3+,Fe3+,Fe2+,Ti)10O14(OH)2 |
| 4.CB.40 | Rinmanite | Mg2Fe4Zn2Sb2O14(OH)2 |
| 4.CB.40 | Iseite | Mn2Mo3O8 |
| 4.CB.40 | Majindeite | Mg2Mo3O8 |
| 4.CB.45 | Claudetite | As2O3 |
| 4.CB.45 | Stibioclaudetite | AsSbO3 |
| 4.CB.50 | Arsenolite | As2O3 |
| 4.CB.50 | Senarmontite | Sb2O3 |
| 4.CB.55 | Valentinite | Sb2O3 |
| 4.CB.60 | Bismite | Bi2O3 |
| 4.CB.70 | Sillénite | Bi12SiO20 |
| 4.CB.75 | Kyzylkumite | Ti2V3+O5(OH) |
| 4.CB.80 | Tietaiyangite | Fe43+Fe2+TiO9 |
Other Names for Sphaerobismoite
Name in Other Languages:
Other Information
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 Sphaerobismoite
Reference List:
Walenta, K. (1979): The secondary minerals of the ore veins of Neubulach, northern Black Forest. Aufschluss: 30: 213-252 (in German); in: Fleischer, M., Mandarino, J.A., Pabst, A. (1980): New mineral names. American Mineralogist: 65: 209
Walenta, K. (1995): Sphaerobismoite, a new mineral of composition Bi2O3 from the Schwarzwald. Aufschluss: 46: 245-248. (in German).
Mineralogical Record: 28: 223-224.
Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)
Walenta, K. (1995): Sphaerobismoite, a new mineral of composition Bi2O3 from the Schwarzwald. Aufschluss: 46: 245-248. (in German).
Mineralogical Record: 28: 223-224.
Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)
Internet Links for Sphaerobismoite
mindat.org URL:
https://www.mindat.org/min-7308.html
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External Links:
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Localities for Sphaerobismoite
This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality.
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(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 (TL) | |
| Min Rec, 28, (3) & Am. Min. (1996) 81, 514 |
| American Mineralogist, Volume 81, pages 1513-1518. 1996 |
Alsó-Rózsa adit, Nagybörzsöny, Börzsöny Mts, Pest Co., Hungary