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Burroite

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Formula:
Ca2(NH4)2(V10O28)·15H2O
Colour:
Orange-yellow
Lustre:
Vitreous
Hardness:
1½ - 2
Specific Gravity:
2.43
Crystal System:
Triclinic
Name:
Named for the Burro mine in which it was found.
Chemically related to wernerbaurite; the two species are the only known natural ammonium calcium vanadates.


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Classification of BurroiteHide

Approved
Approval Year:
2016
First Published:
2017

Physical Properties of BurroiteHide

Vitreous
Colour:
Orange-yellow
Streak:
Yellow
Hardness:
1½ - 2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
on {001}
Fracture:
Irregular/Uneven
Density:
2.43(2) g/cm3 (Measured)    

Chemical Properties of BurroiteHide

Formula:
Ca2(NH4)2(V10O28)·15H2O
IMA Formula:
Ca2(NH4)2(V10O28) · 15H2O

Crystallography of BurroiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 8.779(2) Å, b = 10.311(2) Å, c = 12.060(2) Å
α = 96.740(4)°, β = 107.388(5)°, γ = 114.439°
Ratio:
a:b:c = 0.851 : 1 : 1.17
Unit Cell V:
911.23 ų (Calculated from Unit Cell)
Morphology:
As somewhat flattened prisms up to 2mm large

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.06(100)
9.02(46)
8.10(21)
7.71(94)
7.50(17)
2.950(14)
2.778(16)
2.075(19)

Type Occurrence of BurroiteHide

General Appearance of Type Material:
As orange-yellow, somewhat flattened prisms up to 2 mm in length
Place of Conservation of Type Material:
Mineralogical collections of the Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue numbers 66299 (holotype) and 66300 (cotype)
Geological Setting of Type Material:
On a montroseite- and corvusite-bearing sandstone
Associated Minerals at Type Locality:
Reference:
Kampf, A.R., Nash, B.P., Hughes, J.M., Marty, J. (2017): Burroite, Ca2(NH4)2(V10O28)·15H2O, A New Decavanadate Mineral From the Burro Mine, San Miguel County, Colorado. Canadian Mineralogist: 55: 473-481

Synonyms of BurroiteHide

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 BurroiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Nash, B.P., Marty, J., Hughes, J.M. (2016): Burroite, IMA 2016-079. CNMNC Newsletter No. 34, December 2016, page 1319; Mineralogical Magazine: 80: 1315–1321
Kampf, A.R., Nash, B.P., Hughes, J.M., Marty, J. (2017): Burroite, Ca2(NH4)2(V10O28)·15H2O, A New Decavanadate Mineral From the Burro Mine, San Miguel County, Colorado. Canadian Mineralogist, 55: 473-481

Internet Links for BurroiteHide

Localities for BurroiteHide

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.
USA (TL)
 
  • Colorado
    • San Miguel Co.
      • Slick Rock District
Kampf, A.R., Nash, B.P., Marty, J., Hughes, J.M. (2016): Burroite, IMA 2016-079. CNMNC Newsletter No. 34, December 2016, page 1319; Mineralogical Magazine{ 80: 1315–1321; Kampf, A.R., Nash, B.P., Hughes, J.M., Marty, J. (2017): Burroite, Ca2(NH4)2(V10O28)·15H2O, A New Decavanadate Mineral From the Burro Mine, San Miguel County, Colorado. Canadian Mineralogist, 55: 473-481
Mineral and/or Locality  
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