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The Palermo Mine is the type locality for Samuelsonite. The species is named for Peter Samuelson, who worked the pegmatite for specimens between 1968 and 1974. Samuelsonite is a very rare phosphate at the Palermo Mine.
EDS analysis efforts of several years to clearly identify a samulesonsite specimen have turned up only one strong samuelsonite candidate, the samuelsonite - type 2, below. All other suspect samuelsonite specimens have analyzed to be palermoite. In my [tm] opinion, any specimen labeled as samuelsonite without a supporting analysis is suspect, including most shown below.
Highslide JS
SAMUELSONITE - Type 2   Palermo #1 Mine, Pod 11, N. Groton, NH
2.2 cm specimen. Embedded blades of oxide stained type 2 samuelsonite


Highslide JS
SAMUELSONITE - Type 2   Palermo #1 Mine, Pod 11, N. Groton, NH
Zoom view, 1 cm Embedded blades of oxide stained type 2 samuelsonite
Species:           SAMUELSONITE - Type 2  
Locality:          Palermo #1 Mine, Pod 11, N. Groton, NH
Specimen Size: 2.2 cm specimen, (zoom view, 1 cm). Embedded blades of oxide stained type 2 samuelsonite
Field Collected: Bob Whitmore - 1972
Catalog No.: A Bob Whitmore specimen
Notes: A qualitative EDS analysis on an unpolished grain showed the Mn and Fe content lower than expected for samuelsonite: (Ca,Ba)Ca8Fe2+2Mn2+2Al2[(OH)2|(PO4)10]
The silicon peak may be due to surface contamination.
Black mineral on right side appears to be mostly manganese oxides.
A second EDS analysis #2 in Nov. 2014 on a polished grain from this specimen showed a very convincing match for samuelsonite. The formula for samuelsonite indicates the ratio for Ca:P:Al:Fe:Mn should be 9:10:2:2:2 . These ratios are consistent with this plot. The Si peak seen on the earlier plot is absent, indicating it was very likely due to surface contamination by silica.
Highslide JS
SAMUELSONITE   Palermo #1 Mine, N. Groton, NH
2 mm prismatic samuelsonite crystal with smaller 0.5 mm samuelsonite crystal to right.

Locality:          Palermo #1 Mine, N. Groton, NH
Specimen Size: 2 mm prismatic samuelsonite crystal with smaller 0.5 mm samuelsonite crystal to right.
Field Collected: Clayton Ford. A Gordon Jackson specimen.
Catalog No.:
Notes: This specimen contains several samuelsonite crystals. They are associated with platy habitat goyazite.
Highslide JS
SAMUELSONITE   Palermo #1 Mine, N. Groton, NH
2.5 mm field of view. Prismatic samuelsonite crystal with photo orientation to show termination in foreground.

Locality:          Palermo #1 Mine, N. Groton, NH
Specimen Size: 2.5 mm field of view. Prismatic samuelsonite crystal with photo orientation to show termination in foreground.
Field Collected: Clayton Ford. A Gordon Jackson specimen.
Catalog No.:
Notes: Another samuelsonite crystal on the specimen above. Platy habitat goyazite in foreground.
Highslide JS
SAMUELSONITE   Palermo #1 Mine, N. Groton, NH
Group of prismatic samuelsonite crystals. Largest crystal in rear about 1.7 mm.

Locality:          Palermo #1 Mine, N. Groton, NH
Specimen Size: Group of prismatic samuelsonite crystals. Largest crystal in rear about 1.7 mm.
Field Collected: Clayton Ford. A Gordon Jackson specimen.
Catalog No.:
Notes: Another samuelsonite crystal on the specimen above. This group is deep within a vug and difficult to illuminate
Highslide JS
SAMUELSONITE   Palermo #1 Mine, N. Groton, NH
5 mm field of view. 1.5 mm prismatic samuelsonite crystals with chisel terminations.

Locality:          Palermo #1 Mine, N. Groton, NH
Specimen Size: 5 mm field of view. 1.5 mm prismatic samuelsonite crystals with chisel terminations.
Field Collected: Forrest Fogg.
Catalog No.:
Notes: First of three photos of Bob Janules specimen.
Highslide JS
SAMUELSONITE   Palermo #1 Mine, N. Groton, NH
Group of 2 mm clear, parallel alligned, samuelsonite crystals.

Locality:          Palermo #1 Mine, N. Groton, NH
Specimen Size: Group of 2 mm clear, parallel alligned, samuelsonite crystals.
Field Collected: Forrest Fogg.
Catalog No.:
Notes: Second of three photos of Bob Janules specimen.
Highslide JS
SAMUELSONITE   Palermo #1 Mine, N. Groton, NH
Field of view 2 mm. Clear, parallel alligned, samuelsonite crystals.

Locality:          Palermo #1 Mine, N. Groton, NH
Specimen Size: Field of view 2 mm. Clear, parallel alligned, samuelsonite crystals.
Field Collected: Forrest Fogg.
Catalog No.:
Notes: Third of three photos of Bob Janules specimen.