Parabutlerite (original) (raw)

A valid IMA mineral species - grandfathered

About ParabutleriteHide

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Formula:

Fe3+(SO4)(OH) · 2H2O

Colour:

Pale orange to pale orange-brown; light yellow in transmitted light.

Crystal System:

Orthorhombic

Name:

Named in 1938 by Mark Chance Bandy for its resemblance to Butlerite.

This page provides mineralogical data about Parabutlerite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3081:2

f8b044a0-ecea-453d-940d-66d9307aab0b

IMA Classification of ParabutleriteHide

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Approved, 'Grandfathered' (first described prior to 1959)

Type description reference:

Classification of ParabutleriteHide

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7.DC.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
C : With only medium-sized cations; chains of edge-sharing octahedra

31.9.2.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O

25.10.16

25 : Sulphates
10 : Sulphates of Fe alone

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.

Physical Properties of ParabutleriteHide

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Colour:

Pale orange to pale orange-brown; light yellow in transmitted light.

Cleavage:

Poor/Indistinct
On {110}, poor.

Density:

2.55 g/cm3 (Measured)

Optical Data of ParabutleriteHide

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RI values:

_n_α = 1.598 _n_β = 1.663 _n_γ = 1.737

2V:

Measured: 87° , Calculated: 90°

δ = 0.139

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

Alcaparrosa material:
X = b = Light yellow
Y = c = Greenish yellow
Z = a = Brownish yellow

Argentinian material:
X = b = Colourless
Y = c = Faint yellow
Z = a = Light yellow

Comments:

NOTE: 2V value for Argentinian material = 43°30'.

Chemistry of ParabutleriteHide

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Mindat Formula:

Fe3+(SO4)(OH) · 2H2O

Crystallography of ParabutleriteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 20.0789(8) Å, b = 7.4024(7) Å, c = 7.2294(15) Å

Ratio:

a:b:c = 2.712 : 1 : 0.977

Unit Cell V:

1,074.52 ų (Calculated from Unit Cell)

Morphology:

Crystals prismatic [001]. The prism zone is striated [001].

Comment:

Space group Pnma(0β0)​s0s; the structure is commensurately modulated, with a = 20.0789 (8), b = 7.4024 (7), c = 7.2294 (15) Å and q = 0.4b* (Plášil et al., 2017).

Crystal StructureHide

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Epitaxial Relationships of ParabutleriteHide

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Epitaxy Comments:

Intergrowths, with {011} of parabutlerite nearly parallel to {001} and {100} of butlerite.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Alcaparrosa, Chile. The data are from Cesbron

Geological EnvironmentHide

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Type Occurrence of ParabutleriteHide

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Reference:

Bandy, M.C. (1938) Mineralogy of three sulphate deposits of Northern Chile. American Mineralogist: 23: 669-760 (742-745).

Other Language Names for ParabutleriteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Notes:

Insoluble in cold or hot water; soluble in dilute acids.

Observed as pseudomorphs after copiapite.

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 ParabutleriteHide

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References for ParabutleriteHide

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Reference List:

**Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.**pp.610-611

Localities for ParabutleriteHide

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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.