Parabrandtite (original) (raw)

A valid IMA mineral species

About ParabrandtiteHide

This section is currently hidden. Click the show button to view.

Formula:

Ca2Mn2+(AsO4)2 · 2H2O

Name:

Named in 1987 by Pete J. Dunn, Donald R. Peacor, Shu-Chun Su, Frederick John Wicks, and Fred J. Parker in allusion to its dimorphous relationship with brandtite.

Fairfieldite Group.
The Mn analogue of Unnamed (Fe2+-analogue of Parabrandtite).

Only 3 co-type specimens exist. The material was discovered by Fred Parker, American collector of Franklin Minerals, and a local mineral dealer in Maryland, in a single flat of specimens purchased from a miner, and submitted by Parker for analysis and identification.

Unique IdentifiersHide

This section is currently hidden. Click the show button to view.

Long-form identifier:

mindat:1:1:3080:5

53ea1835-2892-490f-baa8-eb43006d18dc

IMA Classification of ParabrandtiteHide

This section is currently hidden. Click the show button to view.

Type description reference:

Dunn P J, Peacor D R, Su S C, Wicks F J, Parker F J (1987) Parabrandtite, the manganese analogue of talmessite, from Sterling Hill, Ogdensburg, New Jersey. Neues Jahrbuch für Mineralogie, Abhandlungen 157, 113-119

Classification of ParabrandtiteHide

This section is currently hidden. Click the show button to view.

8.CG.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1

40.2.2.8

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

20.8.15

20 : Arsenates (also arsenates with phosphate, but without other anions)
8 : Arsenates of Mn

Mineral SymbolsHide

This section is currently hidden. Click the show button to view.

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of ParabrandtiteHide

This section is currently hidden. Click the show button to view.

Cleavage:

Perfect
{010} and {110}

Density:

3.55(8) g/cm3 (Measured) 3.60 g/cm3 (Calculated)

Optical Data of ParabrandtiteHide

This section is currently hidden. Click the show button to view.

RI values:

_n_α = 1.701(2) _n_β = 1.721(2) _n_γ = 1.751(2)

2V:

Measured: 79° (4), Calculated: 80°

δ = 0.050

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

Chemistry of ParabrandtiteHide

This section is currently hidden. Click the show button to view.

Mindat Formula:

Ca2Mn2+(AsO4)2 · 2H2O

Crystallography of ParabrandtiteHide

This section is currently hidden. Click the show button to view.

Cell Parameters:

a = 5.89(1) Å, b = 7.031(7) Å, c = 5.64(1) Å
α = 96.77(10)°, β = 109.32(10)°, γ = 108.47(8)°

Ratio:

a:b:c = 0.838 : 1 : 0.802

Unit Cell V:

202.49 ų (Calculated from Unit Cell)

Morphology:

Intergrown, parallel, wedge-shaped crystal aggregates to 1.5 mm.

Comment:

by analogy to talmessite

X-Ray Powder DiffractionHide

This section is currently hidden. Click the show button to view.

Powder Diffraction Data:

Geological EnvironmentHide

This section is currently hidden. Click the show button to view.

Type Occurrence of ParabrandtiteHide

This section is currently hidden. Click the show button to view.

General Appearance of Type Material:

Microscopic groups of crystals on the surfaces of the fissures.

Place of Conservation of Type Material:

National Museum of Natural History, Washington, D.C., USA, 163210.

Geological Setting of Type Material:

Fissures traversing massive willemite-franklinite "red" ore in the Sterling Hill ore body.

Associated Minerals at Type Locality:

Reference:

Dunn P J, Peacor D R, Su S C, Wicks F J, Parker F J (1987) Parabrandtite, the manganese analogue of talmessite, from Sterling Hill, Ogdensburg, New Jersey. Neues Jahrbuch für Mineralogie, Abhandlungen 157, 113-119

Synonyms of ParabrandtiteHide

This section is currently hidden. Click the show button to view.

Other Language Names for ParabrandtiteHide

This section is currently hidden. Click the show button to view.

Relationship of Parabrandtite to other SpeciesHide

This section is currently hidden. Click the show button to view.

Other Members of this group:

Common AssociatesHide

This section is currently hidden. Click the show button to view.

Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

This section is currently hidden. Click the show button to view.

Fluorescence of ParabrandtiteHide

This section is currently hidden. Click the show button to view.

Other InformationHide

This section is currently hidden. Click the show button to view.

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 ParabrandtiteHide

This section is currently hidden. Click the show button to view.

References for ParabrandtiteHide

This section is currently hidden. Click the show button to view.

Reference List:

Dunn P J, Peacor D R, Su S C, Wicks F J, Parker F J (1987) Parabrandtite, the manganese analogue of talmessite, from Sterling Hill, Ogdensburg, New Jersey. Neues Jahrbuch für Mineralogie, Abhandlungen 157, 113-119

Localities for ParabrandtiteHide

This section is currently hidden. Click the show button to view.

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

This section is currently hidden. Click the show button to view.

- 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.

Japan
Fukushima Prefecture Iwaki City ⓘ Gozaisho Mine	Alfredo Petrov collection (named parabrandtite on original japanese label, but no analytical data presented)
USA (TL)
New Jersey Sussex County Ogdensburg Sterling Hill ⓘ Sterling Mine (TL)	Dunn P J et al. (1987) +1 other reference