Pumpellyite-(Mn2+) (original) (raw)

A valid IMA mineral species

About Pumpellyite-(Mn2+)Hide

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

Formula:

Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)

Colour:

Pale gray, pink-brown

Specific Gravity:

3.34 (Calculated)

Crystal System:

Monoclinic

Name:

Named for its similarity to other pumpellyite group members.

Raphael Pumpelly [September 8, 1837 Owego, New York, USA – August 10, 1923 Newport, Rhode Island, USA] was an active mining consultant and was professor of Mining Science at Harvard University. He was appointed director of the New England branch of the United States Geological Survey in 1884.

Unique IdentifiersHide

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

Long-form identifier:

mindat:1:1:3310:3

4245eb6f-d3b6-4e81-9d04-b20e90db2843

IMA Classification of Pumpellyite-(Mn2+)Hide

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

IMA Formula:

Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O

Type description reference:

Classification of Pumpellyite-(Mn2+)Hide

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

9.BG.20

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination

58.2.2.8

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
2 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)

16.16.24

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates 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.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Physical Properties of Pumpellyite-(Mn2+)Hide

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

Colour:

Pale gray, pink-brown

Streak:

Light grayish pink

Cleavage:

Perfect
presumably {001}

Density:

3.34 g/cm3 (Calculated)

Optical Data of Pumpellyite-(Mn2+)Hide

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

RI values:

_n_α = 1.752(2) _n_β = 1.795(5) _n_γ = 1.800(5)

δ = 0.048

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

Comments:

X = pale pink; Y = Z = brownish pink.

Chemistry of Pumpellyite-(Mn2+)Hide

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

Mindat Formula:

Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)

Crystallography of Pumpellyite-(Mn2+)Hide

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

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 8.923 Å, b = 5.995 Å, c = 19.156 Å
β = 97.12°

Ratio:

a:b:c = 1.488 : 1 : 3.195

Unit Cell V:

1,016.82 ų (Calculated from Unit Cell)

Morphology:

Platy crystals, to 0.1 mm

Comment:

Space group A2/m (non-standard setting)

Crystal StructureHide

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

Load
Unit Cell |Unit Cell Packed
2x2x2 |3x3x3 |4x4x4

Show
Big Balls |Small Balls |Just Balls |Spacefill
Polyhedra Off |Si Polyhedra |All Polyhedra
Remove metal-metal sticks

Display Options
Black Background |White Background
Perspective On |Perspective Off
2D |Stereo |Red-Blue |Red-Cyan

View
CIF File Best |x |y |z |a |b |c

Rotation
Stop |Start

Labels
Console Off |On |Grey |Yellow

CIF Raw Data - click here to close

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 Pumpellyite-(Mn2+)Hide

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

General Appearance of Type Material:

Aggregates composed of minute platelets elongated along the b-axis and tabular to {001} or of very fine granules in massive braunite ore.

Place of Conservation of Type Material:

National Science Museum, Tokyo, Japan, M23125; National Museum of Natural History, Washington, D.C., USA, 147159, 147160.

Geological Setting of Type Material:

Bedded manganese deposit developed in low-grade metamorphic rocks.

Associated Minerals at Type Locality:

Reference:

Kato, A., Matsubara, S., Yamamoto, R. (1981) Pumpellyite-(Mn2+) from the Ochiai Mine, Yamanashi Prefecture, Japan. Bulletin de Minéralogie: 104: 396-399.

Synonyms of Pumpellyite-(Mn2+)Hide

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

Other Language Names for Pumpellyite-(Mn2+)Hide

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

Relationship of Pumpellyite-(Mn2+) 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.

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 Pumpellyite-(Mn2+)Hide

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

References for Pumpellyite-(Mn2+)Hide

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

Reference List:

Dunn, P. J., Fleischer, M., Chao, G. Y., Cabri, L. J., Mandarino, J. A. (1983) New mineral names. American Mineralogist, 68 (11-12) 1248-1252

Dasgupta, Somnath, Chakraborti, Sanjib, Sengupta, Pulak, Bhattacharya, P. K., Banerjee, H., Roy, Supriya, Fukuoka, M. (1991) Manganese-rich minerals of the pumpellyite group from the Precambrian Sausar Group, India. American Mineralogist, 76 (1-2) 241-245

Localities for Pumpellyite-(Mn2+)Hide

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.