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Bairdite

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About BairditeHide

Jerry A. Baird
Formula:
Pb2Cu2+4Te6+2O10(OH)2(SO4)•H2O
Colour:
Lime green
Lustre:
Adamantine
Hardness:
2 - 3
Specific Gravity:
6.062 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honor of Jerry A. Baird (b. 1940) of Lake Havasu City, Arizona, USA. He is a mineral collector and has collected extensively at Otto Mountain. He supplied numerous samples for research including one of the two co-type specimens of bairdite and one of the two co-types of fuettererite.
New structure type


Classification of BairditeHide

Approved
Approval Year:
2012
First Published:
2013
Approval History:
IMA2012-061

Physical Properties of BairditeHide

Adamantine
Colour:
Lime green
Streak:
Pale lime green
Hardness:
2 - 3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{100}
Fracture:
Irregular/Uneven
Density:
6.062 g/cm3 (Calculated)

Optical Data of BairditeHide

Type:
Biaxial (+)
RI values:
nα = 1.953 nβ = 1.966 nγ = 2.039
2V:
Measured: 47° (2)
Max Birefringence:
δ = 0.086
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Strong
Comments:
Z (pale green) <<< X (green) < Y (green)

Chemical Properties of BairditeHide

Formula:
Pb2Cu2+4Te6+2O10(OH)2(SO4)•H2O
IMA Formula:
Pb2Cu2+4Te6+2O10(OH)2(SO4) · H2O

Crystallography of BairditeHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 14.3126 Å, b = 5.2267 Å, c = 9.4878 Å
β = 106.815°
Ratio:
a:b:c = 2.738 : 1 : 1.815
Unit Cell V:
679.41 ų (Calculated from Unit Cell)
Morphology:
Diamond shaped tabular crystals to 250 microns, in subparallel and fan-shaped aggregates.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.77(50)
4.522(66)
3.480(62)
2.999(97)
2.701(79)
2.614(100)
1.727(65)
1.509(83)
Comments:
From Type Description.

Type Occurrence of BairditeHide

Place of Conservation of Type Material:
Mineral Sciences Department, Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue numbers 64000 and 64001
Geological Setting of Type Material:
Bird Nest drift, Otto Mountain, San Bernadino County, California, USA (35.27677ºN 116.09927ºW)
Reference:
Kampf, A.R., Mills, S.J., Housley, R.M., Rossman, G.R., Marty, J., Thorne, B. (2013) Lead-tellurium oxysalts from Otto Mountain near Baker, California: X. Bairdite, Pb2Cu42+Te26+O10(OH)2(SO4)(H2O), a new mineral with thick HCP layers. American Mineralogist: 98: 1315-1321.

Synonyms of BairditeHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Fuettererite2 photos of Bairdite associated with Fuettererite on mindat.org.
Quartz1 photo of Bairdite associated with Quartz on mindat.org.

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 BairditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Mills, S.J., Housley, R.M., Rossman, G.R., Marty, J., Thorne, B. (2013) Bairdite, IMA 2012-061. CNMNC Newsletter No. 15, February 2013, page 6; Mineralogical Magazine: 77: 1-12.
Kampf, A.R., Mills, S.J., Housley, R.M., Rossman, G.R., Marty, J., Thorne, B. (2013) Lead-tellurium oxysalts from Otto Mountain near Baker, California: X. Bairdite, Pb2Cu42+Te26+O10(OH)2(SO4)(H2O), a new mineral with thick HCP layers. American Mineralogist: 98: 1315-1321.

Internet Links for BairditeHide

Localities for BairditeHide

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.
Kazakhstan
 
  • East Kazakhstan
    • Kurchumskiy District
Pavel M. Kartashov analytical data 2018
USA
 
  • Arizona
    • Cochise Co.
      • Tombstone Hills
        • Tombstone District
          • Contention-Grand Central Mine group
Brent Thorne specimen. EDS and XRD analyzed.
  • California
    • San Bernardino Co.
      • Silver Lake District
        • Soda Mts
          • Baker
Collected by and in the collection of Jerry Baird, Chuck Adan and Brent Thorne. EDS and XRD confirmed.
Kampf, A.R., Mills, S.J., Housley, R.M., Rossman, G.R., Marty, J. and Thorne, B. (2013) Bairdite, IMA 2012-061. CNMNC Newsletter No. 15, February 2013, page 6; Mineralogical Magazine, 77, 1-12.
Collected by and in the collection of Eckhard D. Stuart; PXRD confirmed by Anthony Kampf
Mineral and/or Locality  
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