Prosperite (original) (raw)

A valid IMA mineral species

About ProsperiteHide

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Formula:

Ca2Zn4(AsO4)4 · H2O

Previously given as CaZn2(AsO4)(HAsO4)(OH).

Crystal System:

Monoclinic

Name:

In honour of Prosper John Williams (1910–2001), of Toronto and Vancouver, Canada, South African-Canadian mineral dealer, supplier of many Tsumeb specimens.

This page provides mineralogical data about Prosperite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3288:5

82858702-1192-48fd-b27e-4c663576fd01

IMA Classification of ProsperiteHide

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Type description reference:

Classification of ProsperiteHide

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8.CA.60

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations

40.2.4.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O

20.3.10

20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg

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 ProsperiteHide

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Comment:

Dense aggregates of crystals show a very faint blue tint.

Density:

4.31(1) g/cm3 (Measured) 4.40 g/cm3 (Calculated)

Optical Data of ProsperiteHide

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RI values:

_n_α = 1.746(2) _n_β = 1.748(2) _n_γ = 1.768(2)

2V:

Measured: 34° (2), Calculated: 36°

δ = 0.022

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

Optical Extinction:

Y = b; Z ∧ c = 27°.

Chemistry of ProsperiteHide

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Mindat Formula:

Ca2Zn4(AsO4)4 · H2O

Previously given as CaZn2(AsO4)(HAsO4)(OH).

Crystallography of ProsperiteHide

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Crystal System:

Monoclinic

Cell Parameters:

a = 19.238(2) Å, b = 7.731(1) Å, c = 9.765(1) Å
β = 104.47(1)°

Ratio:

a:b:c = 2.488 : 1 : 1.263

Unit Cell V:

1,406.27 ų (Calculated from Unit Cell)

Morphology:

Slender prismatic crystals in radiating groups and as subparallel aggregates in sheaf-like arrangements. Larger acicular prisms may be composed of several smaller crystals in parallel orientation. Elongate parallel to [001]. In order of decreasing importance, the forms are: a{100}, d{10t}, m{110}, p{111}, z{421}, n{540), k{210}, l{310}, o{301} and x{112}.

Twinning:

No evidence of twinning was found by single-crystal X-ray study or with the petrographic microscope and the universal stage (type material).

Comment:

Point Group: 2/m or m. ; Space Group: C2/c or Cc.

Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0010846	Prosperite	Keller P, Riffel H, Hess H (1982) Die kristallstruktur von prosperit, Ca2Zn4[H2O|(AsO4)4] Zeitschrift fur Kristallographie 158 33-42		1982	Tsumeb, Nambia	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Tsumeb Mine, Namibia. Data from the type description.

Geological EnvironmentHide

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Type Occurrence of ProsperiteHide

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General Appearance of Type Material:

Slender prismatic crystals in radiating groups. Crystals up to 10 mm long and 1 mm in diameter. Also as subparallel aggregates in sheaf-like arrangements.

Place of Conservation of Type Material:

Royal Ontario Museum, Toronto, Ontario, Canada, M35388, M35389, M35391.
The Natural History Museum, London, England, 1978,19.
National Museum of Natural History, Washington, D.C., USA, 143732, 143733.

Geological Setting of Type Material:

A secondary mineral formed in bugs in partially altered massive sulfide ore.

Associated Minerals at Type Locality:

Reference:

GAIT, R.I., STURMAN, B.D. & DUNN, P.J. (1979): Prosperite, HcaZn2(AsO4)2(OH), a new mineral from Tsumeb, South West Africa (Namibia). Canadian Mineralogist 17, 87-92.

Synonyms of ProsperiteHide

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Other Language Names for ProsperiteHide

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Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of ProsperiteHide

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Other InformationHide

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IR Spectrum:

The infrared spectra indicates the presence of (OH).

Thermal Behaviour:

A prominent endothermic peak at 655°C is related to a 4.0 wt. % loss occurring between 469° and 682°C with the main loss between 641° and 665°C.

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 ProsperiteHide

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References for ProsperiteHide

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Localities for ProsperiteHide

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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.