> For the complete documentation index, see [llms.txt](https://doc.duaer.com/zh/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/zh/getting-started/aflow.md).

# 在 Duaer 里查AFLOW

在 Duaer 里：按化学式或元素检索 AFLOW 计算材料：带隙、形成焓、空间群与 Pearson 符号。一次成功查询用 1 额度。
## 能拿到什么

Duaer 数据市场里的「AFLOW」：按化学式或元素检索 AFLOW 计算材料：带隙、形成焓、空间群与 Pearson 符号。查到结果时用 1 额度，结果交给数字组织的下一个节点。

从节点创建器选 Duaer 数据 → AFLOW，或打开 [数据市场](/zh/getting-started/data-market.md)。相关：[Alexandria](/zh/getting-started/alexandria.md)、[Materials Project](/zh/getting-started/materials-project.md)。

## 适合做什么

- 按带隙或形成焓筛选候选化合物。
- 比较同一化学式的不同多形体。

## 在画布里检索

1. 打开节点创建器，选 Duaer 数据 → AFLOW。
2. 填 Formula（如 TiO2）或 Elements（如 Ti,O）。
3. Limit 默认 10，最大 20。执行。

查到结果才扣 1 额度；没有结果、输入有误或上游失败都不扣。

## 用 API 调用

- GET https://api.duaer.com/v1/data/aflow?formula=TiO2
- Authorization: Bearer <Duaer key>

下方是与数据市场「复制技能」相同的英文技能，含参数、示例与返回字段。

## 调用技能（英文）

与数据市场「复制技能」一致。

```
---
name: duaer-aflow
description: >-
  Duaer AFLOW. Computed materials from AFLOW by formula or elements: band gap, formation enthalpy, space group, and Pearson symbol.
  One successful search uses 1 Duaer credit.
---

# Duaer AFLOW

Duaer AFLOW searches the AFLOW database of high-throughput DFT calculations. A formula matches the reduced formula; elements find every compound containing them.

## When to use

- Screen candidate compounds by band gap or formation enthalpy.
- Compare polymorphs of one formula.

## When not to use

- Experimental structures. Use https://skills.duaer.com/cod.md.
- Simulation runs and raw files. Use https://skills.duaer.com/nomad.md.

## Call

`GET https://api.duaer.com/v1/data/aflow?formula=TiO2`

Header: `Authorization: Bearer <Duaer key>`

Use an account key or a model API key.

Get a Duaer key: https://skills.duaer.com/keys.md

## Parameters

Provide `formula` or `elements`.

- `formula` — Formula such as TiO2. Matches the reduced formula.
- `elements` — Optional. Materials that contain all of these, such as Ti,O.
- `limit` — Optional. Rows to return, from 1 to 20. Default 10.

## Examples

- `GET https://api.duaer.com/v1/data/aflow?formula=TiO2` — TiO2 polymorphs with band gaps.
- `GET https://api.duaer.com/v1/data/aflow?elements=Li,Fe&limit=5` — compounds containing lithium and iron.

## Result

The response is `{ "items": [...] }`. Each item has `source`, `title`, `url`, and `summary`, plus:

- `auid`, `aflowPath` — AFLOW ids.
- `formula`, `compound`, `elements` — reduced formula, cell formula, and elements.
- `spaceGroupNumber`, `pearsonSymbol` — relaxed symmetry.
- `bandGapEv`, `formationEnthalpyEvPerAtom` — electronic gap and stability.

AFLOW can take several seconds to answer.

Fields without a value are left out.

## Credits

A search that returns at least one row uses 1 credit.
An empty search, a search that finds nothing, or a failed search uses 0.
Wrong input returns 400 with a message and uses 0.
No remaining credits returns 402 and does not search.
A missing key returns 401.

## Related

- https://skills.duaer.com/alexandria.md — Duaer Alexandria
- https://skills.duaer.com/materials-project.md — Duaer Materials Project

```
## Questions

### Duaer 的AFLOW检索扣多少额度？

查到结果时扣 1 额度；没有结果或出错不扣。

### Duaer AFLOW 为什么比较慢？

AFLOW 上游通常要几秒才返回；Duaer 按化学式过滤后再给出结果。

## 相关

- [在 Duaer 里查Alexandria](https://doc.duaer.com/zh/getting-started/alexandria.md)
- [在 Duaer 里查 Materials Project](https://doc.duaer.com/zh/getting-started/materials-project.md)