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Graphite bearing gneiss outcrop, Vatomandry, Atsinanana, Madagascari
Regional Level Types
Graphite bearing gneiss outcropOutcrop
VatomandryDistrict
AtsinananaRegion
MadagascarCountry

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Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 19° South , 48° East (est.)
Margin of Error:~43km
Locality type:Outcrop
Köppen climate type:Af : Tropical rainforest climate


Lacroix (1922) describes a specimen of evansite brought to him by M. Michaut. It was stated to come from a graphite bearing gneissic rock in the Vatomandry District.

Regions containing this locality

Somali Plate (Somalia Plate)Tectonic Plate
Toamasina Province (Tamatave), MadagascarProvince (Abolished)

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


2 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

Detailed Mineral List:

Evansite
Formula: Al3(PO4)(OH)6 · 6H2O
Habit: colloform
Colour: white
Reference: Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A.Challamel (Éditeur), Paris. p 359. ; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 923.
Graphite
Formula: C
Reference: Lacroix, A. (1922) Minéralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A. Challamel (Éditeur), Paris. p. 359.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite1.CB.05aC
Group 8 - Phosphates, Arsenates and Vanadates
Evansite8.DF.10Al3(PO4)(OH)6 · 6H2O

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Graphite1.3.6.2C
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A3(XO4)Zq·xH2O
Evansite42.1.2.1Al3(PO4)(OH)6 · 6H2O

List of minerals for each chemical element

HHydrogen
H EvansiteAl3(PO4)(OH)6 · 6H2O
CCarbon
C GraphiteC
OOxygen
O EvansiteAl3(PO4)(OH)6 · 6H2O
AlAluminium
Al EvansiteAl3(PO4)(OH)6 · 6H2O
PPhosphorus
P EvansiteAl3(PO4)(OH)6 · 6H2O

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Lacroix, A. (1922) Minéralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A. Challamel (Éditeur), Paris. p. 359.
Palache, C., Berman, H., and Frondel, C. (1951) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 923.


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