Zunyite (original) (raw)
Formula:
Al13Si5O20(OH,F)18Cl
Colour:
Colourless, grey, white, flesh-red
Name:
Named after the type locality, the Zuni mine near Silverton, San Juan County, Colorado, USA.
This page provides mineralogical data about Zunyite.
Long-form identifier:
mindat:1:1:4433:8
2593329a-52ab-4e95-ba5a-b773d208f4ff
Approved, 'Grandfathered' (first described prior to 1959)
Type description reference:
9.BJ.55
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
57.3.1.1
57 : SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
3 : Insular Si3O10 and Larger Noncyclic Groups with [Si5O16] groups
17.3.2
17 : Silicates Containing other Anions
3 : Silicates with chloride (including aluminosilicates)
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Zun | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Zun | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Transparency:
Transparent, Translucent
Colour:
Colourless, grey, white, flesh-red
Cleavage:
Distinct/Good
{111}
Density:
2.88 g/cm3 (Measured)
RI values:
n = 1.562 - 1.600
Birefringence:
Isotropic minerals have no birefringence
Pleochroism:
Non-pleochroic
Mindat Formula:
Al13Si5O20(OH,F)18Cl
Class (H-M):
43_m_ - Hextetrahedral
Cell Parameters:
a = 13.925 Å
Morphology:
Commonly as modified tetrahedral crystals.
Twinning:
Contact and penetration on {111}.
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Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.07 Å | (100) |
| 4.21 Å | (100) |
| 2.679 Å | (90) |
| 1.639 Å | (90) |
| 4.02 Å | (60) |
| 2.840 Å | (50) |
| 2.008 Å | (50) |
General Appearance of Type Material:
Well formed tetrahedral crystals in sulphide. Tiny crystals are clear, larger crystals, reaching 3 mm, contain black inclusions.
Place of Conservation of Type Material:
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 49082.
Reference:
Hillebrand, W.F. (1885) On zunyite and guitermanite, two new minerals from Colorado. Proceedings of the Colorado Scientific Society: 1: 124-132.
Associated Minerals Based on Photo Data:
Notes:
Unaffected by acids except hydrofluoric, in which the action is slow.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
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.
- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.