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Dagenaisite

This page kindly sponsored by John Dagenais
John Dagenais
Formula:
Zn3Te6+O6
Colour:
green, light greenish gray
Lustre:
Pearly
Hardness:
0 - 2
Specific Gravity:
6.0 (Calculated)
Crystal System:
Monoclinic
Name:
Named for John Dagenais (Sept 4, 1945 - ) a prominent collector and micromounter from Vancouver, British Columbia, Canada.
Dagenaisite, Zn3Te6+O6, is a new mineral from the Gold Chain mine, Tintic district, Juab County, Utah, U.S.A. The mineral is the natural counterpart of synthetic Zn3Te6+O6, which has a structure based on an approximate close packing of O atoms in an hhchhc sequence along [100]. Not analogous to mcalpineite, which is cubic. Compare the chemically related zincospiroffite.


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Classification of DagenaisiteHide

Approved
Approval Year:
2017
First Published:
2017

Physical Properties of DagenaisiteHide

Pearly
Transparency:
Transparent, Translucent
Colour:
green, light greenish gray
Streak:
white
Hardness:
0 - 2 on Mohs scale
Hardness Data:
Could not be measured
Comment:
Less than 2
Tenacity:
Flexible
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
6.0 g/cm3 (Calculated)

Chemical Properties of DagenaisiteHide

Formula:
Zn3Te6+O6

Crystallography of DagenaisiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 14.87(2) Å, b = 8.88(2) Å, c = 10.37(2) Å
β = 93.33(2)°
Ratio:
a:b:c = 1.675 : 1 : 1.168
Unit Cell V:
1367 ų
Z:
12
Morphology:

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.311(30)
3.085(22)
3.029(44)
2.744(68)
2.539(100)
2.445(18)
1.657(48)
1.614(17)
Comments:
The five strongest lines in the X-ray powder diffraction patterns are [dobs Å(I)(hkl)]: 4.311(30)(310), 3.029(44)(222), 2.744(68) (-313, 421), 2.539(100) (-132, -422), and 1.6568(48) (-732, 350, -244).

Occurrences of DagenaisiteHide

Paragenetic Mode(s):
•  Oxidation

Type Occurrence of DagenaisiteHide

General Appearance of Type Material:
tiny light greenish-gray platelets, generally intermixed with amorphous material, forming porous masses that are apparently replacements of earlier phases.
Place of Conservation of Type Material:
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 66561, 66562, 66563 and 66564
Geological Setting of Type Material:
late-stage secondary phase formed by the oxidative alteration of earlier Te- and Zn-bearing minerals.
Associated Minerals at Type Locality:
Reference:
Kampf, A.R., Housley, R.M., Marty, J. (2017) Dagenaisite, A New Zinc Tellurate From the Gold Chain Mine, Tintic, Utah, U.S.A. Canadian Mineralogist: 55: 867-873.

Synonyms of DagenaisiteHide

Other InformationHide

Notes:
At room temperature, the mineral is slowly soluble in dilute HCl and rapidly soluble in concentrated HCl.
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 DagenaisiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Marty, J., Kampf, A.R., Housley, R.M., Mills, S.J. and Weiß, S. (2010) Seltene neue Tellurmineralien aus Kalifornien, Utah, Arizona und New Mexiko (USA). Lapis: 35(12): 42-51; 66. [p. 49]
Kampf, A.R., Housley, R.M. and Marty, J. (2017) Dagenaisite, IMA 2017-017. CNMNC Newsletter No. 37, June 2017, page 742. Mineralogical Magazine: 81: 737–742.
Kampf, A.R., Housley, R.M., Marty, J. (2017) Dagenaisite, A New Zinc Tellurate From the Gold Chain Mine, Tintic, Utah, U.S.A. Canadian Mineralogist: 55: 867-873.

Internet Links for DagenaisiteHide

Localities for DagenaisiteHide

ⓘ - 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)
 
  • Utah
    • Juab Co.
      • East Tintic Mts
        • Tintic District
Kampf, A.R., Housley, R.M. and Marty, J. (2017) Dagenaisite, IMA 2017-017. CNMNC Newsletter No. 37, June 2017, page 742; Mineralogical Magazine, 81, 737–742; Kampf, A.R., Housley, R.M., Marty, J. (2017): Dagenaisite, A New Zinc Tellurate From the Gold Chain Mine, Tintic, Utah, U.S.A. Canadian Mineralogist, 55, 867-873.
Marty, J., Kampf, A. R., Housley, R. M., Mills, S. J. & Weiß, S.. (2010). Seltene neue Tellurmineralien aus Kalifornien, Utah, Arizona und New Mexiko (USA). Lapis, 35 (12), 42-51; 66. [p. 49; as unnamed Zn tellurate]
Mineral and/or Locality  
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