Symplesite (original) (raw)
A valid IMA mineral species - grandfathered
About SymplesiteHide
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Formula:
Fe2+3(AsO4)2 · 8H2O
Colour:
Light green, greenish black, light blue, indigo blue
Lustre:
Sub-Vitreous, Greasy, Pearly
Specific Gravity:
2.96 - 3.01
Name:
Named by Johan Friedrich August Breithaupt in 1837 from the Greek 'ουν' "syn" ("together") and 'πλησιαζειν' "plisiazein" ("to bring"), i.e. 'to bring together' because of its relationship with other minerals.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:3851:1
9b59d119-e76b-43a8-a64d-f2e49f9b4cc5
IMA Classification of SymplesiteHide
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Approved, 'Grandfathered' (first described prior to 1959)
Classification of SymplesiteHide
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8.CE.45
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
40.3.8.1
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
20.9.6
20 : Arsenates (also arsenates with phosphate, but without other anions)
9 : Arsenates of Fe
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Sym | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of SymplesiteHide
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Sub-Vitreous, Greasy, Pearly
Comment:
Pearly lustre on cleavage planes.
Colour:
Light green, greenish black, light blue, indigo blue
Streak:
White, bluish white.
Cleavage:
Perfect
On {110}, perfect.
Fracture:
Irregular/Uneven
Translation gliding:
T {1_10}, t[001].
Density:
2.96 - 3.01 g/cm3 (Measured) 3.02 g/cm3 (Calculated)
Comment:
Measured value on Lobenstien material.
Optical Data of SymplesiteHide
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RI values:
_n_α = 1.635 _n_β = 1.668 _n_γ = 1.702
2V:
Measured: 87° , Calculated: 88°
δ = 0.067
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Optical Extinction:
Z^c = 31.5° increasing to 50° as oxidised, X perpendicular to {1-10
Comments:
X = ┴ (110) = Deep blue
Y = Nearly colourless
Z = ^ c 31½° = Pale Yellow
Chemistry of SymplesiteHide
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Mindat Formula:
Fe2+3(AsO4)2 · 8H2O
Crystallography of SymplesiteHide
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Class (H-M):
1 - Pinacoidal
Cell Parameters:
a = 4.7505(2) Å, b = 7.7893(5) Å, c = 9.2567(5) Å
α = 106.372(3)°, β = 93.046(4)°, γ = 98.152(4)°
Ratio:
a:b:c = 0.61 : 1 : 1.188
Morphology:
Crystals small and imperfect, elongated [001]; flattened {110} at times. Spherical aggregates with a coarsely fibrous, radial structure.
Comment:
Runčevski et al. (2015)
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.971 Å | (16) |
| 7.499 Å | (16) |
| 6.785 Å | (100) |
| 5.027 Å | (8) |
| 4.069 Å | (8) |
| 4.007 Å | (8) |
| 3.743 Å | (8) |
| 3.401 Å | (8) |
| 3.177 Å | (8) |
| 3.131 Å | (6) |
| 3.095 Å | (6) |
| 2.970 Å | (8) |
| 2.838 Å | (8) |
| 2.578 Å | (6) |
| 2.493 Å | (2) |
| 2.468 Å | (2) |
| 2.375 Å | (2) |
| 2.355 Å | (4) |
| 2.282 Å | (2) |
| 1.929 Å | (2) |
| 1.860 Å | (2) |
| 1.854 Å | (2) |
| 1.709 Å | (2) |
| 1.683 Å | (2) |
Comments:
ICDD 8-172; very similar to the data for metaköttigite. Data calculated from Runčevski et al. (2015) are more reliable.
Geological EnvironmentHide
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Type Occurrence of SymplesiteHide
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Geological Setting of Type Material:
Oxidised zone of arsenic-bearing hydrothermal deposits.
Associated Minerals at Type Locality:
Other Language Names for SymplesiteHide
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Relationship of Symplesite to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Fluorescence of SymplesiteHide
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Other InformationHide
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Notes:
Soluble in acids. Turns reddish brown in strong KOH solution or in 30% H2O2.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for SymplesiteHide
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References for SymplesiteHide
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Reference List:
Localities for SymplesiteHide
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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
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- 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.