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| Chemistry:
Sb2O3
[Antimony
Oxide] | Discovered
in 1851;
IMA
status: Valid (pre-IMA; Grandfathered). Sénarmontite
is named to
honor Henri Hureau de Sénarmont (1808–1862), French
physicist and mineralogist, School of Mines, Paris,
France, who first noted the species. |
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Classification
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Mineral
Classification: |
Oxides |
Strunz 8th
Ed. ID:
|
4/C.02-20
|
Nickel-Strunz 10th
Ed. ID:
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4.CB.50 |
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4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites,
bismuthites, sulfites, selenites, tellurites, iodates) C : Metal: Oxygen = 2:
3,3: 5, and similar B : With medium-sized cations
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Related
to: |
Arsenolite - Sillenite Series.
Isomorphous with Valentinite.
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Crystal
Data
|
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Crystallography:
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Isometric
- Hexoctahedral
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Crystal
Habit:
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Commonly
as octahedra, to 3 cm, which may be modified by the
cube or dodecahedron; in crusts, granular massive.
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Twinning:
|
None
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Physical
Properties
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|
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Cleavage: |
[111] Poor/Indistinct
in traces
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Fracture: |
Irregular/Uneven
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Tenacity:
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Very
Brittle
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Hardness
(Mohs): |
2.0
- 2.5
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Density:
|
5.2
- 5.3 (g/cm3)
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Luminescence:
|
None |
Radioactivity:
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Not
Radioactive
|
|
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Optical
Properties
|
|
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Color: |
Colorless,
White, Gray
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Transparency: |
Translucent
to Transparent |
Luster: |
Adamantine,
Sub-Adamantine, Resinous |
Refractive
Index: |
2.087
Isotropic
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Birefringence: |
0.0
(Isotropic)
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Pleochroism: |
None |
Anisotrophism: |
Strong anomalous anisotropism, sectored or zoned.
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Occurances
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Geological
Setting: |
Formed
by oxidation of antimony, stibnite, and other antimony
minerals in hydrothermal antimony-bearing deposits. |
Common
Associations: |
Cetineite,
Kermesite, Mopungite, Stibiconite, Sulfur, Valentinite |
Type
Locality: |
Djebel Haminate Mine, Ain Beida, Constantine Province,
Algeria |
Year
Discovered: |
1851
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View
mineral photos: |
Sénarmontite
Mineral Photos and Locations |
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More
Information
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|
|
Mindat.org Webmineral.com |
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|
Sénarmontite
is an extremely rare mineral and gem. Crystals are very
scarce and usually small. Sénarmontite forms excellent
octahedral crystals that can be transparent and colorless
to gray. It is a very soft (2.0 - 2.5) but dense (5.2
- 5.3) mineral often with an adamantine luster.
The
only source of gem quality crystals is the Djebel Haminate Mine, Ain Beida, Constantine Province,
Algeria.
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Sénarmontite
gems for sale:
We
have not photographed our Sénarmontite
gems. Please
check back soon.
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