Gelosaite
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About Gelosaite
Formula:
BiMo6+(2-5x)Mo5+6xO7(OH) · H2O
(0 ≤ x ≤ 0.4)
Colour:
yellow, yellowish green, pale blue, colorless
Lustre:
Adamantine
Hardness:
3
Specific Gravity:
5.114 (Calculated)
Crystal System:
Monoclinic
Name:
After Mario Gelosa (1947–2006), an Italian mineral collector from Porto Torres, Sardinia, Italy.
Classification of Gelosaite
Approved
Approval year:
2009
49.3.8.
49 : HYDRATED MOLYBDATES AND TUNGSTATES
3 : Hydrated Molybdates and Tungstates Containing Hydroxyl or Halogen
49 : HYDRATED MOLYBDATES AND TUNGSTATES
3 : Hydrated Molybdates and Tungstates Containing Hydroxyl or Halogen
Physical Properties of Gelosaite
Adamantine
Transparency:
Transparent
Colour:
yellow, yellowish green, pale blue, colorless
Streak:
white
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
5.114 g/cm3 (Calculated)
Optical Data of Gelosaite
Bireflectance:
birefringent
Pleochroism:
Visible
Comments:
blue and pale blue
Comments:
on pale blue crystals
Chemical Properties of Gelosaite
Formula:
BiMo6+(2-5x)Mo5+6xO7(OH) · H2O
(0 ≤ x ≤ 0.4)
(0 ≤ x ≤ 0.4)
IMA Formula:
BiMo6+(2-5x)Mo5+6xO7(OH) · H2O (0 < x < 0.4)
Idealised Formula:
BiMo2+xO7(OH) · H2O
Elements listed:
Crystallography of Gelosaite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 5.855(1) Å, b = 9.048(1) Å, c = 13.920(3) Å
β = 100.44(3)°
β = 100.44(3)°
Ratio:
a:b:c = 0.647 : 1 : 1.538
Unit Cell V:
725.22 ų (Calculated from Unit Cell)
Z:
4
Twinning:
Common - law unknown
Comment:
space group P21/n
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0018668 | Gelosaite | Orlandi P, Demartin F, Pasero M, Leverett P, Williams P A, Hibbs D E (2011) Gelosaite, BiMo6+(2-5x)Mo5+6xO7(OH)*H2O (0<=x<=0.4), a new mineral from Su Senargiu (CA), Sardinia, Italy, and a second occurrence from Kingsgate, New England, Australia American Mineralogist 96 268-273 | 2011 | Su Senargiu, Sardinia, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.83 Å | (100) |
3.41 Å | (21) |
3.30 Å | (25) |
3.015 Å | (50) |
2.755 Å | (60) |
2.080 Å | (50) |
1.688 Å | (20) |
1.509 Å | (30) |
Type Occurrence of Gelosaite
General Appearance of Type Material:
It occurs as prismatic and very thin, elongated [010] and tabular {100} crystals up to 1 mm in length and a few micrometers in diameter
Place of Conservation of Type Material:
Museo di Storia Naturale e del Territorio of the University of Pisa, catalog number 18910.
Geological Setting of Type Material:
Gelosaite is a secondary mineral formed in the oxidation zone
Associated Minerals at Type Locality:
Synonyms of Gelosaite
Common Associates
Associated Minerals Based on Photo Data:
2 photos of Gelosaite associated with Molybdenite | MoS2 |
2 photos of Gelosaite associated with Quartz | SiO2 |
1 photo of Gelosaite associated with Bismuth | Bi |
1 photo of Gelosaite associated with Anatase | TiO2 |
1 photo of Gelosaite associated with Ferrimolybdite | Fe2(MoO4)3 · nH2O |
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 Gelosaite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Demartin, F., Orlandi, P., Pasero, M., Leverett, P., Williams, P., Hibbs, D. (2011) Gelosaite, BiMo6+(2−5x)Mo5+6xO7(OH)·H2O (0 ≤ x ≤ 0.4), a new mineral from Su Senargiu (CA), Sardinia, Italy and a second occurrence from Kingsgate, New England, Australia. American Mineralogist, 96(2-3), 268-273.
Internet Links for Gelosaite
mindat.org URL:
https://www.mindat.org/min-39660.html
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Localities for Gelosaite
Locality List




All localities listed without proper references should be considered as questionable.
Australia | |
| Orlandi, P., Demartin, F., Pasero, M., Leverett, P., Williams, P.A., Hibbs, D.E. (2011) Gelosaite, BiMo6+ (2–5x) Mo5+ 6xO7 (OH)· H2O (0≤ x≤ 0.4), a new mineral from Su Senargiu (CA), Sardinia, Italy, and a second occurrence from Kingsgate, New England, Australia. American Mineralogist, 96(2-3), 268-273. John Haupt collection |
Orlandi, P., Demartin, F., Pasero, M., Leverett, P., Williams, P. A., & Hibbs, D. E. (2011). Gelosaite, BiMo6+ (2–5x) Mo5+ 6xO7 (OH)· H2O (0≤ x≤ 0.4), a new mineral from Su Senargiu (CA), Sardinia, Italy, and a second occurrence from Kingsgate, New England, Australia. American Mineralogist, 96(2-3), 268-273. | |
Italy (TL) | |
| IMA Approvals - Sept. 2009; Orlandi P., Gelosa M., Bonacina E., Caboni F., Mamberti M., Tanca G.A., Vinci A. (2015): Sette nuove specie mineralogiche della Sardegna. I minerali della mineralizzazione a molibdeno e bismuto di Su Seinargiu (CA). Riv. Mineral. Ital., 39, 2, 84-115.; Demartin, F., Orlandi, P., Pasero, M., Leverett, P., Williams, P. A., Hibbs, D. E. (2011). Gelosaite, BiMo6+ (2–5x) Mo5+ 6xO7 (OH)· H2O (0≤ x≤ 0.4), a new mineral from Su Senargiu (CA), Sardinia, Italy, and a second occurrence from Kingsgate, New England, Australia. American Mineralogist, 96, (2-3), 268-273. |
Old 25 Pipe, Kingsgate, Gough Co., New South Wales, Australia