Gmelinite-k
Gmelinite-K
A variety of Minerals
What is Gmelinite-k?
Gmelinite-Na is one of the rarer zeolites but the most common member of the gmelinite series, gmelinite-Ca, gmelinite-K and gmelinite-Na. It is closely related to the very similar mineral chabazite. Gmelinite was named as a single species in 1825 after Christian Gottlob Gmelin (1792–1860) professor of chemistry and mineralogist from Tübingen, Germany, and in 1997 it was raised to the status of a series.Gmelinite-Na has been synthesised from Na-bearing aluminosilicate gels. The naturally occurring mineral forms striking crystals, shallow, six sided double pyramids, which can be colorless, white, pale yellow, greenish, orange, pink, and red. They have been compared to an angular flying saucer.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Gmelinite-k before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Gmelinite-k Localities Map
See where Gmelinite-k is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Composition of Gmelinite-k
The aluminosilicate framework is composed of tetrahedra linked to form parallel double six-membered rings stacked in two different positions (A and B) in the repeating arrangement AABBAABB. The framework has no Al-Si order. Within the structure there are cavities with a cross-section of up to 4 Å, and also wide channels parallel to the c axis with a diameter of 6.4 Å. Space group: P63/mmc. Unit cell parameters: a=13.72 Å, c=9.95 Å, Z=4.
Quick Facts
Physical Properties
- Hardness (Mohs)
- 4.5
Chemical Properties
- Chemical Formula
- K4(Si8Al4O24) · 11H2O
- Elements
- Al, H, K, O, Si
Identify Gmelinite-k Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
Gmelinite-k FAQs
How do I identify Gmelinite-k?
Gmelinite-k can be identified by its hardness of 4.5 on the Mohs scale. Look for these key characteristics when examining specimens.
How hard is Gmelinite-k?
Gmelinite-k has a hardness of 4.5 on the Mohs scale. This gives it moderate hardness.
What is the composition of gmelinite-k of Gmelinite-k?
The aluminosilicate framework is composed of tetrahedra linked to form parallel double six-membered rings stacked in two different positions (A and B) in the repeating arrangement AABBAABB. The framework has no Al-Si order. Within the structure there are cavities with a cross-section of up to 4 Å, and also wide channels parallel to the c axis with a diameter of 6.4 Å. Space group: P63/mmc. Unit cell parameters: a=13.72 Å, c=9.95 Å, Z=4.
%252FAbenakiite-(ce)-01.jpg&size=small)
