Rare and Uncommon New Hampshire Mineral Species              Return to front page.            Click on image for larger view
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Highslide JS
DUFRENITE    Chandler Mill Mine, Newport, NH
4 mm field of view


Highslide JS
DUFRENITE    Chandler Mill Mine, Newport, NH
1.0 mm mass


Highslide JS
DUFRENITE    Chandler Mill Mine, Newport, NH
1 mm field of view
Species:           DUFRENITE  
Confidence:     3
Chemistry:      Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
Locality:          Chandler Mill Mine, Newport, NH
Specimen Size: 4 mm field of view - top photo
Field Collected: Bob Wilken
Owner: Bob Wilken
Analysis: EDS analysis. This analysis implies a chemistry (normalized for 4 P) of: Ca2.9Fe3.4P4O17.8. This is very heavy on the calcium for dufrenite, but with no other elements showing up, dufrenite is a "best fit."
Notes:
Highslide JS
DUFRENITE    Fletcher Mine, N. Groton, NH
1.5 mm zone @ red arrow of gray-green dufrenite.
Species:           DUFRENITE  
Confidence:     2 (no supporting analysis)
Chemistry:      Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
Locality:          Fletcher Mine, N. Groton, NH
Specimen Size: 1.5 mm zone @ red arrow of gray-green dufrenite.
Field Collected: Bob Whitmore - 1968. Specimen likely sold.
Catalog No.: A Bob Whitmore specimen
Analysis: None
Notes: Basically an iron phosphate with a pinch of calcium. Could be difficult to differentiate from rockbridgeite chemically and visually.
Highslide JS
FERRISYMPLESITE    Parker Mtn. Mine, Center Strafford, NH
4 mm field of view

Species:           FERRISYMPLESITE
Confidence:     4
Chemistry:      Fe3+3(AsO4)2(OH)3 · 5H2O
Locality:          Parker Mtn. Mine, Center Strafford, NH
Specimen Size: 4 mm field of view
Field Collected - owner: Tom Mortimer - 1995
Catalog No.: 1900
Analysis: Ferrisymplesite indicated by EDS analysis of this white crust. An EDS analysis of the white blades on the same specimen with the ferrisymplesite crust also indicate ferrisymplesite.
Notes: White ferrisymplesite crust on green-yellow scorodite on lollingite substrate. Arsenolite, As2O3 was reported from Parker Mtn. by Phillip Foster in 1966. It is also a white crusty mineral, but contains no iron. Scorodite, another iron-arsenic crusty mineral, Fe3+AsO4·2H2O has equal parts Fe and As, where-as this analysis indicates a mineral with Fe > As. It is unknown what level of testing was done by/for Foster to arrive at his arsenolite identification.
Given the possibility of other iron-arsenic species, additional testing will increase confidence.
Highslide JS
FERRISYMPLESITE    Parker Mtn. Mine, Center Strafford, NH
6 mm prism blade group

Species:           FERRISYMPLESITE   
Locality:          Parker Mtn. Mine, Center Strafford, NH
Specimen Size: 6 mm prism blade group
Field Collected: Tom Mortimer - 1995
Catalog No.: 1900
Notes:
Highslide JS
FERROSILITE    Water Pocket, Blackberry Crossing, Albany, NH
3 mm resinous brown mass

Species:           FERROSILITE
Confidence:     3
Chemistry:      Fe2+2Si2O6
Locality:          Water Pocket, Blackberry Crossing, Albany, NH
Specimen Size: 3 mm resinous brown mass
Field Collected: Bob Wilken - 7/7/11
Owner: Tom Mortimer
Catalog No.: u2029
Analysis: The first identification of this iron silicate from this locality was fayalite. A second EDS analysis (BC184 set 13) on a polished grain from this specimen (utilizing an EDS detector with good light element sensitivity) also indicated an iron silicate mineral. The chemistry derived from the atomic %'s gave: Fe2Si2.5O26.7 (ignoring tiny bits of Mn and Al, and the instrument frequently over-estimates oxygen). This analysis suggests an Fe:Si ratio of 4:5, or perhaps 1:1. Fayalite chemistry is: Fe2+2SiO4 .
A better fit for this mineral is ferrosilite, Fe2+2Si2O6.
Notes: An XRD is likely necessary.
Highslide JS
GATUMBAITE   Palermo Mine, N. Groton, NH
2 mm field of view. White sprays embedded in vivianite

Species:           GATUMBAITE
Confidence:     2
Chemistry:      CaAl2(PO4)2(OH)2 · H2O
Locality:          Palermo Mine, N. Groton, NH
Specimen Size: 2 mm field of view. White sprays embedded in vivianite.
Field Collected: Unknown. Found in a box of "Palermo rough" material
Owner: Arnaldo Brunetti - Canada
Analysis: The specimen was labeled gatumbaite. An EDS analysis (BC160 - 3/2/17) of one of these white balls (on carbon tape) gave a result for which gatumbaite may be a "best fit" with some Sr and K substituting for some Ca. The analysis suggests a chemistry (normalized for 2 P): Ca0.35K0.07Sr0.17Al3.21(PO4)2(O)11
Notes: Arnaldo sent me this specimen for analysis.
Highslide JS
GATUMBAITE    Palermo Mine, N. Groton, NH
2 mm field of view. Gatumbaite on bed of vivianite crystals.
Species:           GATUMBAITE (or Sinkankasite)  
Locality:          Palermo Mine, N. Groton, NH
Specimen Size: 2 mm field of view. Gatumbaite on bed of vivianite crystals.
Field Collected: G. Bjareby
Owner: A Bob Whitmore specimen - since sold
Notes: Specimen label reads: "GATUMBAITE - Found by G. Bjareby in 1948." Gatumbaite is not listed in Whitmore & Lawrence's The Pegmatite Mines Known as Palermo.
Unfortunately, I [TM] never had an opportunity to test this.
In a conversation with Bob Whitmore, he said he regretted this species was not first described from Palermo, but delays getting the analysis done allowed the type locality and name escape from Palermo.
Highslide JS
GATUMBAITE    Palermo Mine, N. Groton, NH
7 mm field of view. Radial sprays of gatumbaite on bed of vivianite crystals.
Species:           GATUMBAITE (or Sinkankasite)  
Locality:          Palermo Mine, N. Groton, NH
Specimen Size: 7 mm field of view. Radial sprays of gatumbaite on bed of vivianite crystals.
Field Collected: G. Bjareby
Owner: A Bob Whitmore specimen - since sold
Notes: Another view of the Bjareby gatumbaite specimen. The inner area of the leftmost spray (particularly) appears zoned dark-blue suggesting perhaps a different mineral? The mineral base for the specimen is un-altered triphylite. The triphyllite surface is covered with very small vivianite crystals. The gatumbaite is on top of these micro-vivianites.
From American Mineralogist, vol. 69 pg. 382: "Sinkankasite has been found at the Palermo Mine, in North Groton, New Hampshire, on only one specimen. It occurs as flattened, circular, 2-3 mm sprays of white acicular crystals associated with vivianite in a fracture in massive triphylite. This material was previously described as gatumbaite by Segeler et al. (1981)."
Highslide JS
GATUMBAITE    Palermo Mine, N. Groton, NH
1.7 cm specimen. Gatumbiate on vivianite on triphylite
Species:           GATUMBAITE (or Sinkankasite)  
Locality:          Palermo Mine, N. Groton, NH
Specimen Size: 1.7 cm specimen. Gatumbiate on vivianite on triphylite
Field Collected: G. Bjareby
Owner: A Bob Whitmore specimen - since sold
Notes: Full specimen view of the Bjareby gatumbaite specimen.
Chemistry wise, gatumbaite is close to other calcium-aluminum phosphates also found at Palermo, foggite and crandalite:
Gatumbaite: CaAl2(PO4)2(OH)2 · H2O
Foggite: CaAl(PO4)(OH)2 · H2O
Crandallite: CaAl3(PO4)2(OH,H2O)6
Highslide JS
GORCEIXITE    Plume Mine, N. Groton, NH
1.3 mm field of view
Species:           GORCEIXITE  
Confidence:     5
Chemistry:      BaAl3(PO4)2(OH)5 · H2O
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 1.3 mm field of view
Field Collected: Bob Wilken
Owner: Tom Mortimer
Catalog No.: u1052
Analysis: An EDS analysis of these small crystals indicated gorceixite was the best match.
Notes: Forrest-green bjarebyite crystals are adjacent to these gorceixite crystals.
Highslide JS
GORCEIXITE    Plume Mine, N. Groton, NH
6.0 mm fov Gorceixite xls with iron oxide coating.
Species:           GORCEIXITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 6.0 mm fov Gorceixite xls with iron oxide coating.
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes: This gorceixite was generally closely associated with deteriorating Bjarebyite.
Highslide JS
GORCEIXITE    Plume Mine, N. Groton, NH
Missing measurement and specimen! A single hexagonal perched on tabular Gorceixite
Species:           GORCEIXITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: Missing measurement and specimen! A single hexagonal perched on tabular Gorceixite
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes:
Highslide JS
GORCEIXITE    Plume Mine, N. Groton, NH
6.0 mm fov Gorceixite. xl mass
Species:           GORCEIXITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 6.0 mm fov Gorceixite. xl mass
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes:
Highslide JS
GORCEIXITE    Plume Mine, N. Groton, NH
1.0 mm Gorceixite xl group w. Bjarebyite mass below. A cluster of several interpenetrating xls
Species:           GORCEIXITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 1.0 mm Gorceixite xl group w. Bjarebyite mass below. A cluster of several interpenetrating xls
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes:
Highslide JS
GORCEIXITE    Plume Mine, N. Groton, NH
5.7 mm fov Gorceixite xl masses.
Species:           GORCEIXITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 5.7 mm fov Gorceixite xl masses.
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes:
Highslide JS
GORCEIXITE    Plume Mine, N. Groton, NH
2.7 mm Gorceixite xl grouping. Muscovite xl top center-left.
Species:           GORCEIXITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 2.7 mm Gorceixite xl grouping. Muscovite xl top center-left.
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes:
Highslide JS
GORCEIXITE    Plume Mine, N. Groton, NH
0.8 mm Two intergrown Gorceixite xls bottom center. Top most transparent to transluscent.
Species:           GORCEIXITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 0.8 mm Two intergrown Gorceixite xls bottom center. Top most transparent to transluscent.
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes:
Highslide JS
GORCEIXITE    Plume Mine, N. Groton, NH
3.0 mm fov. Gorceixite ball.
Species:           GORCEIXITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 3.0 mm fov. Gorceixite ball.
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes:
Highslide JS
GORCEIXITE    Plume Mine, N. Groton, NH
2.4 mm fov of Gorceixite xls.
Species:           GORCEIXITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 2.4 mm fov of Gorceixite xls.
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes:
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