Panasqueiraite (original) (raw)

A valid IMA mineral species

About PanasqueiraiteHide

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OH may be replaced by minor F.

Crystal System:

Monoclinic

Name:

Named for the type locality of Panasqueira, Portugal.

Tilasite Group, OH-analogue of isokite.

Extremely rare; most of samples are in fact triplite or other visually similar phosphates (Mila et al., 2014).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3073:7

335c8fa1-9db1-4cc7-b235-a1bab672c315

IMA Classification of PanasqueiraiteHide

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Type description reference:

Classification of PanasqueiraiteHide

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8.BH.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1

41.5.6.3

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq

22.1.12

22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride

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.

Pronunciation of PanasqueiraiteHide

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Pronunciation:

Physical Properties of PanasqueiraiteHide

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Cleavage:

Poor/Indistinct
{010} poor.

Density:

3.22 g/cm3 (Measured) 3.21 g/cm3 (Calculated)

Optical Data of PanasqueiraiteHide

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RI values:

_n_α = 1.590(2) _n_β = 1.596(2) _n_γ = 1.616(2)

2V:

Measured: 51° (2), Calculated: 58°

δ = 0.026

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

Dispersion:

r > v distinct

Pleochroism:

Non-pleochroic

Chemistry of PanasqueiraiteHide

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Mindat Formula:

CaMg(PO4)(OH)

OH may be replaced by minor F.

Crystallography of PanasqueiraiteHide

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Crystal System:

Monoclinic

Cell Parameters:

a = 6.535(3) Å, b = 8.753(4) Å, c = 6.919(4) Å
β = 112.33(4)°

Ratio:

a:b:c = 0.747 : 1 : 0.79

Unit Cell V:

366.09 ų (Calculated from Unit Cell)

Comment:

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

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of PanasqueiraiteHide

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General Appearance of Type Material:

Massive fined grained aggregates

Place of Conservation of Type Material:

Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan.
National Museum of Natural History, Washington, D.C., USA, 144521.

Geological Setting of Type Material:

Hydrothermal tin-tungsten deposit.

Reference:

Isaacs, A.M., Peacor, D.R. (1981) Panasqueiraite, a new mineral: the OH-equivalent of isokite. Canadian Mineralogist: 19: 389-392.

Synonyms of PanasqueiraiteHide

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Other Language Names for PanasqueiraiteHide

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Relationship of Panasqueiraite 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 PanasqueiraiteHide

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Other InformationHide

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Notes:

Blue cathodoluminescence in an electron beam at a 12 kV potential.

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 PanasqueiraiteHide

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References for PanasqueiraiteHide

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Localities for PanasqueiraiteHide

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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.

Portugal
Castelo Branco Covilhã Aldeia de São Francisco de Assis ⓘ Barroca Grande Mine
ⓘ Panasqueira Mines (TL)	American Mineralogist +2 other references
USA
Montana Jefferson County Whitehall Mining District (Cardwell Mining District) ⓘ Golden Sunlight Mine (Telluride and Excelsior; Moonlight Buffalo; Blue Moose; Minera Hill; Sunlight)	Gammons et al. (2020)